Update

Author: urbic

src/mp/figure-sierpinski.mp

@@ -0,0 +1,20 @@
+beginfig(0)
+
+vardef sierpinski(expr order)=
+	save s, ss;
+	picture s, ss;
+	s:=nullpicture;
+	if order=0:
+		addto s contour dir(-30)--dir(90)--dir(210)--cycle;
+	else:
+		ss:=sierpinski(order-1) scaled .5;
+		addto s also ss;
+		addto s also ss shifted (sqrt(3)/2*right);
+		addto s also ss shifted (sqrt(3)/2*dir(60));
+	fi
+	s
+enddef;
+
+draw sierpinski(8) scaled 3cm withcolor .5green;
+
+endfig

src/tex/section-arithmetics.tex

@@ -1,4 +1,4 @@
-\sectionwithlogo{Числа, пары, арифметика}{}
+\sectionwithlogo{Числа, пары, арифметика}{\includeMPgraphics{figure-sierpinski}}
 
 %%%%%%%%%%
 

src/tex/section-example.tex

@@ -96,11 +96,11 @@
 \begin{screen}
 \prompt{\% }\userinput{mpost example.mp}\par}
 \uncover<3->{%
-\only<1-3>{This is MetaPost, version 2.02 (TeX Live 2022/TeX Live)\par
+\only<1-3>{This is MetaPost, version 2.10 (TeX Live 2022/TeX Live)\par
 (example.mp [1] )\par
 1 output file written: example.1\par
 Transcript written on example.log.}%
-\only<4>{Это MetaPost, версия 2.02 (TeX Live 2022/TeX Live)\par
+\only<4>{Это MetaPost, версия 2.10 (TeX Live 2022/TeX Live)\par
 (example.mp [1] )\par
 Записан 1 выходной файл: example.1\par
 Протокол записан в example.log.}}%

src/tex/section-transforms.tex

@@ -111,7 +111,7 @@
 
 %%%%%%%%%%
 
-\begin{frame}{Растяжение}
+\begin{frame}{Гомотетия}
 \centering
 \LARGE
 \only<1>{\includeMPgraphics{figure-cat-scaled-1}}%