Actually I want an involution on Banach algebra B such that
- ||x*|| $\le$ c.||x|| $\forall$ x in B and some c > 1
- $\exists$ y in B such that ||y*|| $\ne$ ||y||
2026-03-30 07:08:54.1774854534
Example of an bounded , self-inverse, anti-multiplicative, anti-linear operator on banach algebra
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