Let A be an Unbounded operator with dense domain $D(A)$ in a Banach space $X$. Can we have a continuous function $f$ defined on $[a,b]$, taking values on $D(A)$ but with $Af$ not Riemann Integrable as a function $[a,b]\to X$?.
2026-03-26 06:16:33.1774505793
Unbounded closed operator commuting with Riemann integral.
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