*定義 [#sae00782] -Let X and Y be Banach spaces. A linear operator T:X→Y is called compact if T takes bounded sets in X into precompact sets in Y. *性質 [#m03fec69] *出典 [#v63583bf] -どこにでも載ってる。
*定義 [#sae00782] -Let X and Y be Banach spaces. A linear operator T:X→Y is called compact if T takes bounded sets in X into precompact sets in Y. *性質 [#m03fec69] *出典 [#v63583bf] -どこにでも載ってる。