Mathematics · Functional Analysis
A bounded linear operator T on a Hilbert space H is unitary if and only if:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1TT = T
- 2TT* = TT = I✓
- 3T* = T-2
- 4T* = T
Correct answer
TT* = TT = I
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