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15
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Is the canonical projection $p_i\colon\operatorname{lim}X\to X(i)$ an open map?

Published on
#general-topology #category-theory #limits-colimits #open-map
32
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What can I say about the function $f$?

Published on
#sequences-and-series #metric-spaces #open-map
132
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Prove a real $f$ is injective if for all open sets $U$ in $\mathbb{R}$, $f(U)$ is open.

Published on
#real-analysis #functions #proof-verification #continuity #open-map
73
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Is there an open mapping theorem bewteen complete normed spaces without assuming linearity?

Published on
#general-topology #functional-analysis #open-map
70
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Continuous open maps

Published on
#general-topology #continuity #solution-verification #open-map
39
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Showing that a map is open by usying lower boundedness of adjoint

Published on
#functional-analysis #adjoint-operators #open-map #closed-graph
35
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Minkowski sum of two sets in NLS

Published on
#general-topology #elementary-set-theory #metric-spaces #open-map
76
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Show that T is a surjective linear application

Published on
#functional-analysis #adjoint-operators #open-map
107
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When a quotient map of topological graph is open?

Published on
#general-topology #graph-theory #quotient-spaces #cw-complexes #open-map
705
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Characterizations of continuous, closed, and open maps

Published on
#general-topology #continuity #open-map #closed-map
28
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Function Coefficients on Open Interval

Published on
#real-analysis #calculus #general-topology #open-map
57
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A question regarding the openness of a function on $\mathbb C^3$

Published on
#complex-analysis #analysis #open-map
167
Views

Use the Maximum modulus principle and the zeros of an analytic function.

Published on
#complex-analysis #analytic-functions #open-map
91
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Some questions regarding continuity and open and closed sets.

Published on
#continuity #metric-spaces #examples-counterexamples #open-map #closed-map
40
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Understanding the idea of the proof of a question.

Published on
#real-analysis #functional-analysis #measure-theory #normed-spaces #open-map

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