タイトル通り.mathlogってTikZ使えないのか~悲しいな~…….
あまりに悲しいのでコードだけ貼っていきます.画像はTikZ→pngのやり方がいまいちわかんなかったのとめんどくさかったので(そしてこのコードが必要な人は既に$\LaTeX$をある程度使えるはずなので)省略します.必要なものは
\usepackage{tikz}
\usetikzlibrary {arrows.meta}
の2つ(たぶん).ここからアレンジしておえかきするなら
\usetikzlibrary{intersections,calc,arrows}
\usetikzlibrary {bending}
とかあった方がいいかも.私はふいんきで$\LaTeX$を使っています…….
\begin{tikzpicture}
\draw[-] (6,0) to (4,4);
\draw[-] (4,4) to (0,0);
\draw[-] (0,0) to (6,0);
\end{tikzpicture}
\begin{tikzpicture}
\draw[-] (6,0) to (4,4);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]}](6,0) to (5,2);
\draw[-] (4,4) to (0,0);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]}] (4,4) to (2,2);
\draw[-] (0,0) to (6,0);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]}] (0,0) to (3,0);
\end{tikzpicture}
\begin{tikzpicture}
\draw[-] (5,2) to (4,4);
\draw[-] (4,4) to (2,2);
\draw[-] (2,2) to (5,2);
\draw[-] (3,0) to (2,2);
\draw[-] (2,2) to (0,0);
\draw[-] (0,0) to (3,0);
\draw[-] (6,0) to (5,2);
\draw[-] (5,2) to (3,0);
\draw[-] (3,0) to (6,0);
\end{tikzpicture}
\begin{tikzpicture}
\draw[-,transform canvas={yshift=6pt}] (5,2) to (4,4);
\draw[-,transform canvas={yshift=6pt}] (4,4) to (2,2);
\draw[-,transform canvas={yshift=6pt}] (2,2) to (5,2);
\draw[-,transform canvas={xshift=-6pt}] (3,0) to (2,2);
\draw[-,transform canvas={xshift=-6pt}] (2,2) to (0,0);
\draw[-,transform canvas={xshift=-6pt}] (0,0) to (3,0);
\draw[-,transform canvas={xshift=6pt}] (6,0) to (5,2);
\draw[-,transform canvas={xshift=6pt}] (5,2) to (3,0);
\draw[-,transform canvas={xshift=6pt}] (3,0) to (6,0);
\draw[-] (2,2) to (5,2);
\draw[-] (3,0) to (2,2);
\draw[-] (5,2) to (3,0);
\end{tikzpicture}
\begin{tikzpicture}
\draw[-,transform canvas={yshift=6pt}] (5,2) to (4,4);
\draw[-,transform canvas={yshift=6pt}] (4,4) to (2,2);
\draw[-,transform canvas={yshift=6pt}] (2,2) to (5,2);
\draw[-,transform canvas={xshift=-6pt}] (3,0) to (2,2);
\draw[-,transform canvas={xshift=-6pt}] (2,2) to (0,0);
\draw[-,transform canvas={xshift=-6pt}] (0,0) to (3,0);
\draw[-,transform canvas={xshift=6pt}] (6,0) to (5,2);
\draw[-,transform canvas={xshift=6pt}] (5,2) to (3,0);
\draw[-,transform canvas={xshift=6pt}] (3,0) to (6,0);
\draw[-] (2,2) to (5,2);
\draw[-] (3,0) to (2,2);
\draw[-] (5,2) to (3,0);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]},transform canvas={xshift=6pt}] (6,0) to (5.5,1);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]},transform canvas={xshift=6pt}] (5,2) to (4,1);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]},transform canvas={xshift=6pt}] (3,0) to (4.5,0);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]},transform canvas={yshift=6pt}] (5,2) to (4.5,3);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]},transform canvas={yshift=6pt}] (4,4) to (3,3);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]},transform canvas={yshift=6pt}] (2,2) to (3.5,2);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]},transform canvas={xshift=-6pt}] (3,0) to (2.5,1);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]},transform canvas={xshift=-6pt}] (2,2) to (1,1);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]},transform canvas={xshift=-6pt}] (0,0) to (1.5,0);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]}] (5,2) to (3.5,2);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]}] (2,2) to (2.5,1);
\draw[arrows = {-Stealth[length=12pt, inset=8pt]}] (3,0) to (4,1);
\end{tikzpicture}
TikZで生成される通常の矢印だと物足りないときがあるから(例えば複素解析で経路積分するときとか,向き付けされた単体複体を考えるときとか),矢印を上手に大きくする方法が思いつかなかったので, こちらのサイト を参考にしました.参考文献に載せておきます.ところでそろそろ章立てのやり方を覚えたい.