4 ms·
You should distinguish the meaning of = in mathematical and meta-mathematical statements. “42y = yx, therefore 42 = x” is fine; but “let 42 = x” is not.
by LudwigNagasena 4y ago
You should distinguish the meaning of = in mathematical and meta-mathematical statements. “42y = yx, therefore 42 = x” is fine; but “let 42 = x” is not.