대한수학회보 (Bulletin of the Korean Mathematical Society)
- 제33권3호
- /
- Pages.445-453
- /
- 1996
- /
- 1015-8634(pISSN)
- /
- 2234-3016(eISSN)
Remarks on M-ideals of compact operators
초록
A closed subspace J of a Banach space X is called an M-ideal in X if the annihilator $J^\perp$ of J is an L-summand of $X^*$. That is, there exists a closed subspace J' of $X^*$ such that $X^* = J^\perp \oplus J'$ and $\left\