This commit is contained in:
Andreaierardi 2020-05-15 13:51:49 +02:00
parent 0eed4c5a85
commit 6ca2c25e70
14 changed files with 581 additions and 41 deletions

View File

@ -0,0 +1,11 @@
\relax
\@nameuse{bbl@beforestart}
\babel@aux{english}{}
\@writefile{toc}{\contentsline {chapter}{\numberline {1}Lecture 15 - 04-05-2020}{1}\protected@file@percent }
\@writefile{lof}{\addvspace {10\p@ }}
\@writefile{lot}{\addvspace {10\p@ }}
\@writefile{toc}{\contentsline {section}{\numberline {1.1}Regret analysis of OGD}{1}\protected@file@percent }
\@writefile{toc}{\contentsline {subsection}{\numberline {1.1.1}Projected OGD}{2}\protected@file@percent }
\@writefile{lof}{\contentsline {figure}{\numberline {1.1}{\ignorespaces }}{2}\protected@file@percent }
\@writefile{lof}{\contentsline {figure}{\numberline {1.2}{\ignorespaces }}{2}\protected@file@percent }
\@writefile{lof}{\contentsline {figure}{\numberline {1.3}{\ignorespaces }}{3}\protected@file@percent }

View File

@ -0,0 +1,401 @@
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (MiKTeX 2.9.7300 64-bit) (preloaded format=pdflatex 2020.4.13) 15 MAY 2020 13:51
entering extended mode
**./lecture15.tex
(lecture15.tex
LaTeX2e <2020-02-02> patch level 5
L3 programming layer <2020-03-06>
("C:\Program Files\MiKTeX 2.9\tex/latex/subfiles\subfiles.cls"
Document Class: subfiles 2020/02/14 v1.6 Multi-file projects (class)
Preamble taken from file `../main.tex'
("C:\Program Files\MiKTeX 2.9\tex/latex/tools\verbatim.sty"
Package: verbatim 2019/11/10 v1.5r LaTeX2e package for verbatim enhancements
\every@verbatim=\toks15
\verbatim@line=\toks16
\verbatim@in@stream=\read2
)
("C:\Program Files\MiKTeX 2.9\tex/latex/import\import.sty"
Package: import 2020/04/01 v 6.2
) (../main.tex
("C:\Program Files\MiKTeX 2.9\tex/latex/base\report.cls"
Document Class: report 2019/12/20 v1.4l Standard LaTeX document class
("C:\Program Files\MiKTeX 2.9\tex/latex/base\size12.clo"
File: size12.clo 2019/12/20 v1.4l Standard LaTeX file (size option)
)
\c@part=\count167
\c@chapter=\count168
\c@section=\count169
\c@subsection=\count170
\c@subsubsection=\count171
\c@paragraph=\count172
\c@subparagraph=\count173
\c@figure=\count174
\c@table=\count175
\abovecaptionskip=\skip47
\belowcaptionskip=\skip48
\bibindent=\dimen134
)
("C:\Program Files\MiKTeX 2.9\tex/latex/amsmath\amsmath.sty"
Package: amsmath 2020/01/20 v2.17e AMS math features
\@mathmargin=\skip49
For additional information on amsmath, use the `?' option.
("C:\Program Files\MiKTeX 2.9\tex/latex/amsmath\amstext.sty"
Package: amstext 2000/06/29 v2.01 AMS text
("C:\Program Files\MiKTeX 2.9\tex/latex/amsmath\amsgen.sty"
File: amsgen.sty 1999/11/30 v2.0 generic functions
\@emptytoks=\toks17
\ex@=\dimen135
))
("C:\Program Files\MiKTeX 2.9\tex/latex/amsmath\amsbsy.sty"
Package: amsbsy 1999/11/29 v1.2d Bold Symbols
\pmbraise@=\dimen136
)
("C:\Program Files\MiKTeX 2.9\tex/latex/amsmath\amsopn.sty"
Package: amsopn 2016/03/08 v2.02 operator names
)
\inf@bad=\count176
LaTeX Info: Redefining \frac on input line 227.
\uproot@=\count177
\leftroot@=\count178
LaTeX Info: Redefining \overline on input line 389.
\classnum@=\count179
\DOTSCASE@=\count180
LaTeX Info: Redefining \ldots on input line 486.
LaTeX Info: Redefining \dots on input line 489.
LaTeX Info: Redefining \cdots on input line 610.
\Mathstrutbox@=\box45
\strutbox@=\box46
\big@size=\dimen137
LaTeX Font Info: Redeclaring font encoding OML on input line 733.
LaTeX Font Info: Redeclaring font encoding OMS on input line 734.
\macc@depth=\count181
\c@MaxMatrixCols=\count182
\dotsspace@=\muskip16
\c@parentequation=\count183
\dspbrk@lvl=\count184
\tag@help=\toks18
\row@=\count185
\column@=\count186
\maxfields@=\count187
\andhelp@=\toks19
\eqnshift@=\dimen138
\alignsep@=\dimen139
\tagshift@=\dimen140
\tagwidth@=\dimen141
\totwidth@=\dimen142
\lineht@=\dimen143
\@envbody=\toks20
\multlinegap=\skip50
\multlinetaggap=\skip51
\mathdisplay@stack=\toks21
LaTeX Info: Redefining \[ on input line 2859.
LaTeX Info: Redefining \] on input line 2860.
)
("C:\Program Files\MiKTeX 2.9\tex/latex/systeme\systeme.sty"
("C:\Program Files\MiKTeX 2.9\tex/latex/xstring\xstring.sty"
("C:\Program Files\MiKTeX 2.9\tex/generic/xstring\xstring.tex"
\integerpart=\count188
\decimalpart=\count189
)
Package: xstring 2019/02/06 v1.83 String manipulations (CT)
)
("C:\Program Files\MiKTeX 2.9\tex/generic/systeme\systeme.tex"
\SYS_systemecode=\toks22
\SYS_systempreamble=\toks23
\SYSeqnum=\count190
)
Package: systeme 2019/01/13 v0.32 Mise en forme de systemes d'equations (CT)
)
("C:\Program Files\MiKTeX 2.9\tex/latex/amsfonts\amssymb.sty"
Package: amssymb 2013/01/14 v3.01 AMS font symbols
("C:\Program Files\MiKTeX 2.9\tex/latex/amsfonts\amsfonts.sty"
Package: amsfonts 2013/01/14 v3.01 Basic AMSFonts support
\symAMSa=\mathgroup4
\symAMSb=\mathgroup5
LaTeX Font Info: Redeclaring math symbol \hbar on input line 98.
LaTeX Font Info: Overwriting math alphabet `\mathfrak' in version `bold'
(Font) U/euf/m/n --> U/euf/b/n on input line 106.
))
("C:\Program Files\MiKTeX 2.9\tex/latex/subfiles\subfiles.sty"
Package: subfiles 2020/02/14 v1.6 Multi-file projects (package)
)
("C:\Program Files\MiKTeX 2.9\tex/generic/babel\babel.sty"
Package: babel 2020/02/28 3.41 The Babel package
("C:\Program Files\MiKTeX 2.9\tex/generic/babel\switch.def"
File: switch.def 2020/02/28 3.41 Babel switching mechanism
)
*************************************
* Local config file bblopts.cfg used
*
("C:\Program Files\MiKTeX 2.9\tex/latex/arabi\bblopts.cfg"
File: bblopts.cfg 2005/09/08 v0.1 add Arabic and Farsi to "declared" options of
babel
)
("C:\Program Files\MiKTeX 2.9\tex/latex/babel-english\english.ldf"
Language: english 2017/06/06 v3.3r English support from the babel system
("C:\Program Files\MiKTeX 2.9\tex/generic/babel\babel.def"
File: babel.def 2020/02/28 3.41 Babel common definitions
\babel@savecnt=\count191
\U@D=\dimen144
("C:\Program Files\MiKTeX 2.9\tex/generic/babel\txtbabel.def")
\bbl@readstream=\read3
\bbl@dirlevel=\count192
)
Package babel Info: \l@canadian = using hyphenrules for english
(babel) (\language0) on input line 102.
Package babel Info: \l@australian = using hyphenrules for ukenglish
(babel) (\language72) on input line 105.
Package babel Info: \l@newzealand = using hyphenrules for ukenglish
(babel) (\language72) on input line 108.
))
("C:\Program Files\MiKTeX 2.9\tex/latex/xcolor\xcolor.sty"
Package: xcolor 2016/05/11 v2.12 LaTeX color extensions (UK)
("C:\Program Files\MiKTeX 2.9\tex/latex/graphics-cfg\color.cfg"
File: color.cfg 2016/01/02 v1.6 sample color configuration
)
Package xcolor Info: Driver file: pdftex.def on input line 225.
("C:\Program Files\MiKTeX 2.9\tex/latex/graphics-def\pdftex.def"
File: pdftex.def 2018/01/08 v1.0l Graphics/color driver for pdftex
)
Package xcolor Info: Model `cmy' substituted by `cmy0' on input line 1348.
Package xcolor Info: Model `hsb' substituted by `rgb' on input line 1352.
Package xcolor Info: Model `RGB' extended on input line 1364.
Package xcolor Info: Model `HTML' substituted by `rgb' on input line 1366.
Package xcolor Info: Model `Hsb' substituted by `hsb' on input line 1367.
Package xcolor Info: Model `tHsb' substituted by `hsb' on input line 1368.
Package xcolor Info: Model `HSB' substituted by `hsb' on input line 1369.
Package xcolor Info: Model `Gray' substituted by `gray' on input line 1370.
Package xcolor Info: Model `wave' substituted by `hsb' on input line 1371.
("C:\Program Files\MiKTeX 2.9\tex/latex/graphics\dvipsnam.def"
File: dvipsnam.def 2016/06/17 v3.0m Driver-dependent file (DPC,SPQR)
))
("C:\Program Files\MiKTeX 2.9\tex/latex/graphics\graphicx.sty"
Package: graphicx 2019/11/30 v1.2a Enhanced LaTeX Graphics (DPC,SPQR)
("C:\Program Files\MiKTeX 2.9\tex/latex/graphics\keyval.sty"
Package: keyval 2014/10/28 v1.15 key=value parser (DPC)
\KV@toks@=\toks24
)
("C:\Program Files\MiKTeX 2.9\tex/latex/graphics\graphics.sty"
Package: graphics 2019/11/30 v1.4a Standard LaTeX Graphics (DPC,SPQR)
("C:\Program Files\MiKTeX 2.9\tex/latex/graphics\trig.sty"
Package: trig 2016/01/03 v1.10 sin cos tan (DPC)
)
("C:\Program Files\MiKTeX 2.9\tex/latex/graphics-cfg\graphics.cfg"
File: graphics.cfg 2016/06/04 v1.11 sample graphics configuration
)
Package graphics Info: Driver file: pdftex.def on input line 105.
)
\Gin@req@height=\dimen145
\Gin@req@width=\dimen146
)
("C:\Program Files\MiKTeX 2.9\tex/latex/sectsty\sectsty.sty"
Package: sectsty 2002/02/25 v2.0.2 Commands to change all sectional heading sty
les
LaTeX Warning: Command \underbar has changed.
Check if current package is valid.
LaTeX Warning: Command \underline has changed.
Check if current package is valid.
) ("C:\Program Files\MiKTeX 2.9\tex/latex/framed\framed.sty"
Package: framed 2011/10/22 v 0.96: framed or shaded text with page breaks
\OuterFrameSep=\skip52
\fb@frw=\dimen147
\fb@frh=\dimen148
\FrameRule=\dimen149
\FrameSep=\dimen150
)
("C:\Program Files\MiKTeX 2.9\tex/latex/titlesec\titlesec.sty"
Package: titlesec 2019/10/16 v2.13 Sectioning titles
\ttl@box=\box47
\beforetitleunit=\skip53
\aftertitleunit=\skip54
\ttl@plus=\dimen151
\ttl@minus=\dimen152
\ttl@toksa=\toks25
\titlewidth=\dimen153
\titlewidthlast=\dimen154
\titlewidthfirst=\dimen155
)
("C:\Program Files\MiKTeX 2.9\tex/latex/base\fontenc.sty"
Package: fontenc 2020/02/11 v2.0o Standard LaTeX package
)))
("C:\Program Files\MiKTeX 2.9\tex/latex/l3backend\l3backend-pdfmode.def"
File: l3backend-pdfmode.def 2020-03-12 L3 backend support: PDF mode
\l__kernel_color_stack_int=\count193
\l__pdf_internal_box=\box48
)
(lecture15.aux)
\openout1 = `lecture15.aux'.
LaTeX Font Info: Checking defaults for OML/cmm/m/it on input line 2.
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for OMS/cmsy/m/n on input line 2.
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for OT1/cmr/m/n on input line 2.
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for T1/cmr/m/n on input line 2.
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for TS1/cmr/m/n on input line 2.
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for OMX/cmex/m/n on input line 2.
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for U/cmr/m/n on input line 2.
LaTeX Font Info: ... okay on input line 2.
("C:\Program Files\MiKTeX 2.9\tex/context/base/mkii\supp-pdf.mkii"
[Loading MPS to PDF converter (version 2006.09.02).]
\scratchcounter=\count194
\scratchdimen=\dimen156
\scratchbox=\box49
\nofMPsegments=\count195
\nofMParguments=\count196
\everyMPshowfont=\toks26
\MPscratchCnt=\count197
\MPscratchDim=\dimen157
\MPnumerator=\count198
\makeMPintoPDFobject=\count199
\everyMPtoPDFconversion=\toks27
) ("C:\Program Files\MiKTeX 2.9\tex/latex/epstopdf-pkg\epstopdf-base.sty"
Package: epstopdf-base 2020-01-24 v2.11 Base part for package epstopdf
("C:\Program Files\MiKTeX 2.9\tex/generic/infwarerr\infwarerr.sty"
Package: infwarerr 2019/12/03 v1.5 Providing info/warning/error messages (HO)
)
("C:\Program Files\MiKTeX 2.9\tex/latex/grfext\grfext.sty"
Package: grfext 2019/12/03 v1.3 Manage graphics extensions (HO)
("C:\Program Files\MiKTeX 2.9\tex/generic/kvdefinekeys\kvdefinekeys.sty"
Package: kvdefinekeys 2019-12-19 v1.6 Define keys (HO)
))
("C:\Program Files\MiKTeX 2.9\tex/latex/kvoptions\kvoptions.sty"
Package: kvoptions 2019/11/29 v3.13 Key value format for package options (HO)
("C:\Program Files\MiKTeX 2.9\tex/generic/ltxcmds\ltxcmds.sty"
Package: ltxcmds 2019/12/15 v1.24 LaTeX kernel commands for general use (HO)
)
("C:\Program Files\MiKTeX 2.9\tex/generic/kvsetkeys\kvsetkeys.sty"
Package: kvsetkeys 2019/12/15 v1.18 Key value parser (HO)
))
("C:\Program Files\MiKTeX 2.9\tex/latex/pdftexcmds\pdftexcmds.sty"
Package: pdftexcmds 2019/11/24 v0.31 Utility functions of pdfTeX for LuaTeX (HO
)
("C:\Program Files\MiKTeX 2.9\tex/generic/iftex\iftex.sty"
Package: iftex 2020/03/06 v1.0d TeX engine tests
)
Package pdftexcmds Info: \pdf@primitive is available.
Package pdftexcmds Info: \pdf@ifprimitive is available.
Package pdftexcmds Info: \pdfdraftmode found.
)
Package epstopdf-base Info: Redefining graphics rule for `.eps' on input line 4
85.
Package grfext Info: Graphics extension search list:
(grfext) [.pdf,.png,.jpg,.mps,.jpeg,.jbig2,.jb2,.PDF,.PNG,.JPG,.JPE
G,.JBIG2,.JB2,.eps]
(grfext) \AppendGraphicsExtensions on input line 504.
)
Chapter 1.
Underfull \hbox (badness 10000) in paragraph at lines 7--9
[]
LaTeX Font Info: Trying to load font information for U+msa on input line 9.
("C:\Program Files\MiKTeX 2.9\tex/latex/amsfonts\umsa.fd"
File: umsa.fd 2013/01/14 v3.01 AMS symbols A
)
LaTeX Font Info: Trying to load font information for U+msb on input line 9.
("C:\Program Files\MiKTeX 2.9\tex/latex/amsfonts\umsb.fd"
File: umsb.fd 2013/01/14 v3.01 AMS symbols B
)
Underfull \hbox (badness 10000) in paragraph at lines 14--20
[]
[1
{C:/Users/AndreDany/AppData/Local/MiKTeX/2.9/pdftex/config/pdftex.map}]
<../img/lez15-img1.JPG, id=18, 242.40562pt x 112.92188pt>
File: ../img/lez15-img1.JPG Graphic file (type jpg)
<use ../img/lez15-img1.JPG>
Package pdftex.def Info: ../img/lez15-img1.JPG used on input line 45.
(pdftex.def) Requested size: 117.00119pt x 54.50513pt.
Underfull \hbox (badness 10000) in paragraph at lines 42--49
[]
<../img/lez15-img2.JPG, id=19, 185.19188pt x 109.91063pt>
File: ../img/lez15-img2.JPG Graphic file (type jpg)
<use ../img/lez15-img2.JPG>
Package pdftex.def Info: ../img/lez15-img2.JPG used on input line 54.
(pdftex.def) Requested size: 117.00119pt x 69.44026pt.
Underfull \hbox (badness 10000) in paragraph at lines 61--68
[]
Underfull \hbox (badness 10000) in paragraph at lines 70--75
[]
[2 <../img/lez15-img1.JPG> <../img/lez15-img2.JPG>]
<../img/lez15-img3.JPG, id=26, 122.70844pt x 88.07906pt>
File: ../img/lez15-img3.JPG Graphic file (type jpg)
<use ../img/lez15-img3.JPG>
Package pdftex.def Info: ../img/lez15-img3.JPG used on input line 89.
(pdftex.def) Requested size: 117.00119pt x 83.98506pt.
Underfull \hbox (badness 10000) in paragraph at lines 82--93
[]
[3 <../img/lez15-img3.JPG>] (lecture15.aux) )
Here is how much of TeX's memory you used:
5121 strings out of 480934
69325 string characters out of 2909670
332085 words of memory out of 3000000
20869 multiletter control sequences out of 15000+200000
547529 words of font info for 56 fonts, out of 3000000 for 9000
1141 hyphenation exceptions out of 8191
42i,7n,50p,333b,236s stack positions out of 5000i,500n,10000p,200000b,50000s
<C:\Users\AndreDany\AppData\Local
\MiKTeX\2.9\fonts/pk/ljfour/jknappen/ec/dpi600\ecbx1440.pk> <C:\Users\AndreDany
\AppData\Local\MiKTeX\2.9\fonts/pk/ljfour/jknappen/ec/dpi600\ecti1200.pk> <C:\U
sers\AndreDany\AppData\Local\MiKTeX\2.9\fonts/pk/ljfour/jknappen/ec/dpi600\ecbx
1200.pk> <C:\Users\AndreDany\AppData\Local\MiKTeX\2.9\fonts/pk/ljfour/jknappen/
ec/dpi600\ecrm1200.pk> <C:\Users\AndreDany\AppData\Local\MiKTeX\2.9\fonts/pk/lj
four/jknappen/ec/dpi600\ecbx1728.pk> <C:\Users\AndreDany\AppData\Local\MiKTeX\2
.9\fonts/pk/ljfour/jknappen/ec/dpi600\ecbx2488.pk><C:/Program Files/MiKTeX 2.9/
fonts/type1/public/amsfonts/cm/cmex10.pfb><C:/Program Files/MiKTeX 2.9/fonts/ty
pe1/public/amsfonts/cm/cmmi12.pfb><C:/Program Files/MiKTeX 2.9/fonts/type1/publ
ic/amsfonts/cm/cmmi6.pfb><C:/Program Files/MiKTeX 2.9/fonts/type1/public/amsfon
ts/cm/cmmi8.pfb><C:/Program Files/MiKTeX 2.9/fonts/type1/public/amsfonts/cm/cmr
12.pfb><C:/Program Files/MiKTeX 2.9/fonts/type1/public/amsfonts/cm/cmr8.pfb><C:
/Program Files/MiKTeX 2.9/fonts/type1/public/amsfonts/cm/cmsy10.pfb><C:/Program
Files/MiKTeX 2.9/fonts/type1/public/amsfonts/cm/cmsy8.pfb><C:/Program Files/Mi
KTeX 2.9/fonts/type1/public/amsfonts/symbols/msam10.pfb><C:/Program Files/MiKTe
X 2.9/fonts/type1/public/amsfonts/symbols/msbm10.pfb>
Output written on lecture15.pdf (3 pages, 183434 bytes).
PDF statistics:
215 PDF objects out of 1000 (max. 8388607)
0 named destinations out of 1000 (max. 500000)
16 words of extra memory for PDF output out of 10000 (max. 10000000)

View File

@ -2,6 +2,94 @@
\begin{document}
\chapter{Lecture 15 - 04-05-2020}
\section{Regret analysis of OGD}
We introduce the \bred{Regret}.
\\
$$
\frac{1}{m} \ \sum_{t=1}^{T} \ell_t(w_t) - \frac{1}{T} \ \sum_{t=1}^{T} \ell_t(u^*_t)
$$
$$
(x_1,y_1) ...(x_t,y_t) \qquad \ell_t(w) = \left( w^T \, x_t - y_t\right)^2
$$
we build a loss function for example with the square loss.
\\
The important thing is that $\ell_1 , \ell_2, ...$ is a sequence of \textbf{convex losses}.
\\\\
In general we define the regret in this way:
$$
R_T(u) \ = \ \frac{1}{m} \ \sum_{t=1}^{T} \ell_t(w_t) - \frac{1}{T} \ \sum_{t=1}^{T} \ell_t(u_t)
$$\\
The Gradiant descent is one of the simplest algorithm for minimising a convex function. We recall the iteration did by the algorithm:
$$
w_{t+1} \leftarrow w_t - \eta_t \nabla f(w_t) \qquad \eta_t > 0 \textbf{ learning rate} \quad \textit{f convex}
$$
$$
f: \barra{R}^d \rightarrow \barra{R} \textit{ that's why use the gradiand instead of the derivative}
$$
Learning rate can depend on time and we approach the region of the function f where the region is 0. We keep on moving in the X axes in the direction where the function is decreasing.
\newpage
\subsection{Projected OGD}
2 parameters: $\eta > 0$ and $U > 0$
\\
Initialisation: $ w_1 = (0,...,0)$
\\
For $t = 1,2,...$
1) \blue{Gradiant step}:
$$w'_{t+1} = w_t - \frac{\eta}{\sqrt[]{t}} \ \nabla \ell_t(w_t) \qquad (x_t, y_t) \rightsquigarrow \ell_t
$$
\begin{figure}[h]
\centering
\includegraphics[width=0.3\linewidth]{../img/lez15-img1.JPG}
\caption{}
%\label{fig:}
\end{figure}\\
2) \blue{Projection step}: $$
w_{t+1} = arg \min_{w: \| w \| \leq U} \| w- w'_{t+1} \| $$ \textbf{Projection of $w'_{t+1}$ onto the ball of radius $U$}.
\begin{figure}[h]
\centering
\includegraphics[width=0.3\linewidth]{../img/lez15-img2.JPG}
\caption{}
%\label{fig:}
\end{figure}\\
Now we define the Regret:
$$
U^*_T = arg \min_{U \in \barra{R}^d \ \|U \| \leq U} \frac{1}{T} \ \sum_{t=1}^{T} \ell_t(U)
$$
We are interested in bounding the regret $R_T\left(U^*_T\right) $
\\\\
I will Fix $\ell_1, ... \ell_t$ \qquad let $U= U^{\divideontimes}_T$ for $U$.
\\
Taylor's theorem for multivariate functions\\
Let's look a univariate first \quad $f: \barra{R} \rightarrow \barra{R}$ \textit{( has to be twice differentiable) }\qquad $w, u \in \barra{R}$
$$
f(u) = f(w) + f'(w) \, (u-w) + \frac{1}{2} \, f^"(x) \, (u-w)^2
$$
\\\\
For the multivariate case:
\\
$f: \barra{R}^d \rightarrow \barra{R} \quad$ twice differentiable \ $ \forall u, w \in \barra{R}^d$
$$
f(u) = f(w) + \nabla f(w)^T \, (u-w) + \frac{1}{2} \left(u-w\right)^T \nabla^2 f(\xi) \, (u-w)
$$
where $\xi$ is some point on the segment goining $u$ and $w$.
We have the Hessian matrix of $f$:
$$
\nabla^2 f(x)_{ij} \ = \ \frac{\partial^2 f(x)}{\partial x_i \, \partial x_j} \vert x=x_i
$$
If $f$ is convex then, $\nabla^2 f$ is positive and semidefinite.\\
$
\forall x \in \barra{R}^d \quad \forall z \in \barra{R}^d \qquad z^T \, \nabla^2 f(x) \, z \geq 0
$
\begin{figure}[h]
\centering
\includegraphics[width=0.3\linewidth]{../img/lez15-img3.JPG}
\caption{}
%\label{fig:}
\end{figure}\\
min. 38:38
\end{document}

View File

@ -165,21 +165,24 @@
\@writefile{toc}{\contentsline {chapter}{\numberline {15}Lecture 15 - 04-05-2020}{96}\protected@file@percent }
\@writefile{lof}{\addvspace {10\p@ }}
\@writefile{lot}{\addvspace {10\p@ }}
\@writefile{toc}{\contentsline {chapter}{\numberline {16}Lecture 16 - 05-05-2020}{97}\protected@file@percent }
\@writefile{toc}{\contentsline {section}{\numberline {15.1}Regret analysis of OGD}{96}\protected@file@percent }
\@writefile{toc}{\contentsline {subsection}{\numberline {15.1.1}Projected OGD}{97}\protected@file@percent }
\@writefile{lof}{\contentsline {figure}{\numberline {15.1}{\ignorespaces }}{97}\protected@file@percent }
\@writefile{toc}{\contentsline {chapter}{\numberline {16}Lecture 16 - 05-05-2020}{98}\protected@file@percent }
\@writefile{lof}{\addvspace {10\p@ }}
\@writefile{lot}{\addvspace {10\p@ }}
\@writefile{toc}{\contentsline {chapter}{\numberline {17}Lecture 17 - 11-05-2020}{98}\protected@file@percent }
\@writefile{toc}{\contentsline {chapter}{\numberline {17}Lecture 17 - 11-05-2020}{99}\protected@file@percent }
\@writefile{lof}{\addvspace {10\p@ }}
\@writefile{lot}{\addvspace {10\p@ }}
\@writefile{toc}{\contentsline {chapter}{\numberline {18}Lecture 18 - 12-05-2020}{99}\protected@file@percent }
\@writefile{toc}{\contentsline {chapter}{\numberline {18}Lecture 18 - 12-05-2020}{100}\protected@file@percent }
\@writefile{lof}{\addvspace {10\p@ }}
\@writefile{lot}{\addvspace {10\p@ }}
\@writefile{toc}{\contentsline {section}{\numberline {18.1}Kernel functions}{99}\protected@file@percent }
\@writefile{toc}{\contentsline {subsection}{\numberline {18.1.1}Feature expansion}{99}\protected@file@percent }
\@writefile{lof}{\contentsline {figure}{\numberline {18.1}{\ignorespaces }}{99}\protected@file@percent }
\@writefile{toc}{\contentsline {subsection}{\numberline {18.1.2}Kernels implements feature expansion (Efficiently}{100}\protected@file@percent }
\@writefile{toc}{\contentsline {section}{\numberline {18.2}Gaussian Kernel}{101}\protected@file@percent }
\@writefile{lof}{\contentsline {figure}{\numberline {18.2}{\ignorespaces }}{102}\protected@file@percent }
\@writefile{lof}{\contentsline {figure}{\numberline {18.3}{\ignorespaces }}{102}\protected@file@percent }
\@writefile{toc}{\contentsline {section}{\numberline {18.1}Kernel functions}{100}\protected@file@percent }
\@writefile{toc}{\contentsline {subsection}{\numberline {18.1.1}Feature expansion}{100}\protected@file@percent }
\@writefile{lof}{\contentsline {figure}{\numberline {18.1}{\ignorespaces }}{100}\protected@file@percent }
\@writefile{toc}{\contentsline {subsection}{\numberline {18.1.2}Kernels implements feature expansion (Efficiently}{101}\protected@file@percent }
\@writefile{toc}{\contentsline {section}{\numberline {18.2}Gaussian Kernel}{102}\protected@file@percent }
\@writefile{lof}{\contentsline {figure}{\numberline {18.2}{\ignorespaces }}{103}\protected@file@percent }
\@writefile{lof}{\contentsline {figure}{\numberline {18.3}{\ignorespaces }}{103}\protected@file@percent }
\bibstyle{abbrv}
\bibdata{main}

View File

@ -78,9 +78,10 @@
\contentsline {figure}{\numberline {14.3}{\ignorespaces }}{94}%
\contentsline {figure}{\numberline {14.4}{\ignorespaces }}{95}%
\addvspace {10\p@ }
\contentsline {figure}{\numberline {15.1}{\ignorespaces }}{97}%
\addvspace {10\p@ }
\addvspace {10\p@ }
\addvspace {10\p@ }
\contentsline {figure}{\numberline {18.1}{\ignorespaces }}{99}%
\contentsline {figure}{\numberline {18.2}{\ignorespaces }}{102}%
\contentsline {figure}{\numberline {18.3}{\ignorespaces }}{102}%
\contentsline {figure}{\numberline {18.1}{\ignorespaces }}{100}%
\contentsline {figure}{\numberline {18.2}{\ignorespaces }}{103}%
\contentsline {figure}{\numberline {18.3}{\ignorespaces }}{103}%

View File

@ -1,4 +1,4 @@
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (MiKTeX 2.9.7300 64-bit) (preloaded format=pdflatex 2020.4.13) 14 MAY 2020 19:11
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (MiKTeX 2.9.7300 64-bit) (preloaded format=pdflatex 2020.4.13) 15 MAY 2020 12:36
entering extended mode
**./main.tex
(main.tex
@ -2464,7 +2464,7 @@ Underfull \hbox (badness 10000) in paragraph at lines 202--211
[]
Overfull \hbox (10.59775pt too wide) detected at line 223
Overfull \hbox (10.59775pt too wide) detected at line 224
\OML/cmm/m/it/12 h\OT1/cmr/m/n/12 (\OML/cmm/m/it/12 x\OT1/cmr/m/n/12 ) = \OML/c
mm/m/it/12 w[] x `[]\OT1/cmr/m/n/12 (\OML/cmm/m/it/12 w\OT1/cmr/m/n/12 ) = \OML
/cmm/m/it/12 `\OT1/cmr/m/n/12 (\OML/cmm/m/it/12 w[] x[]; y[]\OT1/cmr/m/n/12 ) [
@ -2475,15 +2475,49 @@ r/m/n/12 )[]
) [95 <./lectures/../img/lez14-img4.JPG>] (lectures/lecture15.tex
Chapter 15.
) [96
] (lectures/lecture16.tex
Underfull \hbox (badness 10000) in paragraph at lines 7--9
[]
Underfull \hbox (badness 10000) in paragraph at lines 14--20
[]
[96
]
<lectures/../img/lez15-img1.JPG, id=404, 242.40562pt x 112.92188pt>
File: lectures/../img/lez15-img1.JPG Graphic file (type jpg)
<use lectures/../img/lez15-img1.JPG>
Package pdftex.def Info: lectures/../img/lez15-img1.JPG used on input line 44.
(pdftex.def) Requested size: 117.00119pt x 54.50513pt.
! Missing $ inserted.
<inserted text>
$
l.50 \end{document}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
)
Underfull \hbox (badness 10000) in paragraph at lines 40--137
[]
[97 <./lectures/../img/lez15-img1.JPG>] (lectures/lecture16.tex
Chapter 16.
) [97
) [98
] (lectures/lecture17.tex
Chapter 17.
) [98
) [99
] (lectures/lecture18.tex
Chapter 18.
@ -2497,7 +2531,7 @@ Underfull \hbox (badness 10000) in paragraph at lines 16--21
[]
<lectures/../img/lez18-img1.JPG, id=410, 381.67593pt x 159.59625pt>
<lectures/../img/lez18-img1.JPG, id=414, 381.67593pt x 159.59625pt>
File: lectures/../img/lez18-img1.JPG Graphic file (type jpg)
<use lectures/../img/lez18-img1.JPG>
Package pdftex.def Info: lectures/../img/lez18-img1.JPG used on input line 29.
@ -2513,7 +2547,7 @@ Underfull \hbox (badness 10000) in paragraph at lines 38--41
[]
[99
[100
<./lectures/../img/lez18-img1.JPG>]
Overfull \hbox (4.83661pt too wide) in paragraph at lines 45--45
@ -2546,7 +2580,7 @@ Underfull \hbox (badness 10000) in paragraph at lines 79--88
[]
[100]
[101]
Underfull \hbox (badness 10000) in paragraph at lines 94--111
[]
@ -2567,7 +2601,7 @@ Overfull \hbox (16.83592pt too wide) detected at line 112
(\OML/cmm/m/it/12 x[]\OT1/cmr/m/n/12 )
[]
<lectures/../img/lez18-img2.JPG, id=417, 716.6775pt x 146.79843pt>
<lectures/../img/lez18-img2.JPG, id=421, 716.6775pt x 146.79843pt>
File: lectures/../img/lez18-img2.JPG Graphic file (type jpg)
<use lectures/../img/lez18-img2.JPG>
Package pdftex.def Info: lectures/../img/lez18-img2.JPG used on input line 124
@ -2591,8 +2625,8 @@ Underfull \hbox (badness 10000) in paragraph at lines 120--128
LaTeX Warning: `h' float specifier changed to `ht'.
[101]
<lectures/../img/lez18-img3.JPG, id=421, 221.32687pt x 176.91093pt>
[102]
<lectures/../img/lez18-img3.JPG, id=426, 221.32687pt x 176.91093pt>
File: lectures/../img/lez18-img3.JPG Graphic file (type jpg)
<use lectures/../img/lez18-img3.JPG>
Package pdftex.def Info: lectures/../img/lez18-img3.JPG used on input line 133
@ -2618,7 +2652,7 @@ Underfull \hbox (badness 10000) in paragraph at lines 147--154
[]
[102 <./lectures/../img/lez18-img2.JPG> <./lectures/../img/lez18-img3.JPG>])
[103 <./lectures/../img/lez18-img2.JPG> <./lectures/../img/lez18-img3.JPG>])
Underfull \hbox (badness 10000) in paragraph at lines 171--145
[]
@ -2628,18 +2662,18 @@ Underfull \hbox (badness 10000) in paragraph at lines 171--145
[]
[103] (main.bbl
[104] (main.bbl
LaTeX Warning: Empty `thebibliography' environment on input line 3.
) [104
) [105
] (main.aux) )
Here is how much of TeX's memory you used:
5634 strings out of 480934
85716 string characters out of 2909670
5640 strings out of 480934
85890 string characters out of 2909670
336249 words of memory out of 3000000
21239 multiletter control sequences out of 15000+200000
21244 multiletter control sequences out of 15000+200000
561784 words of font info for 96 fonts, out of 3000000 for 9000
1141 hyphenation exceptions out of 8191
34i,13n,42p,311b,361s stack positions out of 5000i,500n,10000p,200000b,50000s
@ -2671,9 +2705,9 @@ s/cm/cmr8.pfb><C:/Program Files/MiKTeX 2.9/fonts/type1/public/amsfonts/cm/cmsy1
/Program Files/MiKTeX 2.9/fonts/type1/public/amsfonts/cm/cmsy8.pfb><C:/Program
Files/MiKTeX 2.9/fonts/type1/public/amsfonts/symbols/msam10.pfb><C:/Program Fil
es/MiKTeX 2.9/fonts/type1/public/amsfonts/symbols/msbm10.pfb>
Output written on main.pdf (105 pages, 2454637 bytes).
Output written on main.pdf (106 pages, 2473242 bytes).
PDF statistics:
932 PDF objects out of 1000 (max. 8388607)
938 PDF objects out of 1000 (max. 8388607)
0 named destinations out of 1000 (max. 500000)
346 words of extra memory for PDF output out of 10000 (max. 10000000)
351 words of extra memory for PDF output out of 10000 (max. 10000000)

View File

@ -69,10 +69,12 @@
\contentsline {subsection}{\numberline {14.2.1}Online Learning }{93}%
\contentsline {subsection}{\numberline {14.2.2}Online Gradiant Descent (OGD)}{95}%
\contentsline {chapter}{\numberline {15}Lecture 15 - 04-05-2020}{96}%
\contentsline {chapter}{\numberline {16}Lecture 16 - 05-05-2020}{97}%
\contentsline {chapter}{\numberline {17}Lecture 17 - 11-05-2020}{98}%
\contentsline {chapter}{\numberline {18}Lecture 18 - 12-05-2020}{99}%
\contentsline {section}{\numberline {18.1}Kernel functions}{99}%
\contentsline {subsection}{\numberline {18.1.1}Feature expansion}{99}%
\contentsline {subsection}{\numberline {18.1.2}Kernels implements feature expansion (Efficiently}{100}%
\contentsline {section}{\numberline {18.2}Gaussian Kernel}{101}%
\contentsline {section}{\numberline {15.1}Regret analysis of OGD}{96}%
\contentsline {subsection}{\numberline {15.1.1}Projected OGD}{97}%
\contentsline {chapter}{\numberline {16}Lecture 16 - 05-05-2020}{98}%
\contentsline {chapter}{\numberline {17}Lecture 17 - 11-05-2020}{99}%
\contentsline {chapter}{\numberline {18}Lecture 18 - 12-05-2020}{100}%
\contentsline {section}{\numberline {18.1}Kernel functions}{100}%
\contentsline {subsection}{\numberline {18.1.1}Feature expansion}{100}%
\contentsline {subsection}{\numberline {18.1.2}Kernels implements feature expansion (Efficiently}{101}%
\contentsline {section}{\numberline {18.2}Gaussian Kernel}{102}%