摘要: 2.1 $\Vert f\Vert\geq 0$ obvious $\Vert a-b\Vert=\Vert b-a\Vert$ by definition $f\in\mathscr A$ then $-f\in\mathscr A$ Triangle Inequality $\Vert a+b\ 阅读全文
posted @ 2023-04-03 22:31 WenDavid552 阅读(34) 评论(1) 推荐(0) 编辑