"Obvious" is the most dangerous word in mathematics. “显而易见”是数学中最危险的词。 -- Eric Temple Bell 埃里克·坦普尔·贝尔
"Obvious" is the most dangerous word in mathematics.
“显而易见”是数学中最危险的词。
-- Eric Temple Bell 埃里克·坦普尔·贝尔