Considering the following operator: $$ A f = f'',\qquad D(A):=\{f\in W^{2,p}(0,1),f'(0)=0\quad and\quad f'(1)=f(1) \} $$ I want to know how can I find its resolvent set, that is $\rho(A)$. Thank you for help
2026-03-25 09:48:31.1774432111
Resolvent set of second derivative
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