Let $T$ and $S$ be positive selfdjoint bounded operators on a Hilbert space $H$. Let $s(T)$ be the support projection of $T$. Do we have $$ s(T+S) \geq s(T) ? $$ (and also $s(T+S) \geq s(S)$)
2026-03-27 17:52:30.1774633950
support projection of a sum of positive operators
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