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15
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The subspace of eventually zero sequences. Banach algebra.

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#sequences-and-series #functional-analysis #banach-spaces #banach-algebras
25
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Intersection of norms on algebras

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#normed-spaces #banach-algebras
131
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Quasinilpotent operator.

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#functional-analysis #operator-theory #banach-spaces #banach-algebras
166
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An algebra with a strictly positive state + condition ? to become a C$^*$-algebra.

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#spectral-theory #c-star-algebras #banach-algebras
88
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Is the Banach Algebra generated by a separable subset separable?

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#functional-analysis #banach-algebras #separable-spaces
99
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Commuting idempotents repel each other

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#functional-analysis #banach-algebras
435
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norm of the resolvent inequality

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#functional-analysis #operator-algebras #spectral-theory #banach-algebras
115
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Spectral radius of a matrix in a Banach algebra

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#functional-analysis #operator-algebras #spectral-theory #banach-algebras #spectral-radius
49
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Norm determines lower bound for invertible elements

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#sequences-and-series #functional-analysis #limits #banach-algebras
85
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$\mathcal A$ is a Banach algebra. Can there be two different $*$ operators which both make $\mathcal A$ a $C^*$-algebra?

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#operator-theory #c-star-algebras #banach-algebras
108
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Positive functionals on the disc algebra

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#complex-analysis #functional-analysis #banach-algebras
205
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Banach Algebra exponentials

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#functional-analysis #banach-algebras #functional-calculus
451
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Homomorphism of complex unital Banach algebra is continuous

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#functional-analysis #analysis #operator-theory #spectral-theory #banach-algebras
175
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spectral radius of a unilateral forward weighted shift

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#functional-analysis #operator-theory #spectral-theory #banach-algebras
84
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Show the existence of a weighted shift operator that converges to a unilateral weighted shift operator

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#functional-analysis #operator-theory #spectral-theory #banach-algebras

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