C..5.1 記号

かなり醜悪な例ですが、

\[
  \therefore\quad
  c\geqq a+b \fallingdotseq 1.23\quad\mbox{($\because$ $a=1$, $b=0.23$)}
\]

$$% latex2html id marker 416\therefore\quad c\geqq a+b \fallingdotseq 1.23\quad\mbox{($\because$\ $a=1$, $b=0.2345$)}$$

\[
  {\Bbb R}, {\Bbb C}, {\Bbb Z}, {\Bbb N}
\]

$${\Bbb R}, {\Bbb C}, {\Bbb Z}, {\Bbb N}$$