Optimization by Vector Space Methods经典语录及段落句子摘抄

好书网为大家整理了经典好书《Optimization by Vector Space Methods》中的经典语录，精彩段落及优美句子，重读经典，感悟人生。让读者沉浸在自己的阅读世界里，忘记周围的世界， 与作者一起在另外一个世界里快乐、悲伤、愤怒、平和，欢迎大家阅读~

Proposition 1. Let X be a Banach space, M a closed subspace of X, and X/M the quotient space with the quotient norm defined as above. Then X/M is also a Banach space.