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Results tagged with calculus-of-variations
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user 11512
Questions on the calculus of variations, which deals with the optimization of functionals mostly defined on infinite dimensional spaces.
6
votes
What are the major differences between real and complex Banach space?
Consider a bounded operator $T$ from a Hilbert space $H$ into itself, i.e. $T \in B(H)$. You can then define the numerical radius $r(T)$ as the radius of the numerical range $W(T)$, i.e.
$$
W(T) = \{ …
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