纯数学和应用数学之间的相互作用是真正创新发生的地方。

"Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers."

Color is my day-long obsession, joy and torment.

现实与幻想的边界比我们想象的更薄，有时甚至完全消失。