发布于 2025-05-14
摘要
1. Let be a Banach space, and let with . (i). Prove that is bijec …
泛函分析
发布于 2025-05-12
摘要
1. Let be a complete metric space, and let be precompact. Prove t …
发布于 2025-04-06
摘要
1. Let be a metric space. Let , , and . (1) Prove that is open. , …