The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.
數(shù)學(xué)中最重要的是理解概念，而不僅僅是記憶公式。
某個命題可以從某一組公理通過某一規(guī)則系統(tǒng)推導(dǎo)出來，這一事實本身并不使其為真。
History is that certainty produced at the point where the imperfections of memory meet the inadequacies of documentation.
The smallest details often hold the greatest truths.