List questions from examples-counterexamples

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Generalized Riemann Integral: Bounded Nonexample?

Published on 14 Nov 2014 - 10:16

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Existence Adjoint Operator: Boundedness?

Published on 26 Mar 2026 - 22:12

91

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What would be an example such that $\langle a\rangle\langle b\rangle \neq \langle ab\rangle$?

Published on 14 Nov 2014 - 18:37

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Does existence of non-trivial solution of $S(x,y,z) = 0, \; S(y,z,x) = 0, \; S(z,x,y) = 0$ implies existence of trivial solution at $x=y=z$ axis?

Published on 15 Nov 2014 - 10:59

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Is a ring $R$ factorial $\iff$ $R[X]$ factorial?

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Just How Strong is Associativity?

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Does a continuous point-wise limit imply uniform convergence?

Published on 16 Nov 2014 - 7:59

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Find ideal defining $Gr_2(\mathbb{C}^5)$ in Pluker embedding

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What do the operator semigroups have to do with PDE's?

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Is this question wrong? Sequence of polynomial approximates $\sin$

Published on 17 Nov 2014 - 1:10

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First Countable Spaces are Hausdorff or Not?

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Example (?) of a Banach space containing an uncomplemented copy of itself

Published on 19 Nov 2014 - 4:34

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Example of Hausdorff and Second Countable Space that is Not Metrizable

Published on 19 Nov 2014 - 12:38

840

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Nonmeasurable Functions

Published on 21 Nov 2014 - 17:36

List Question

Examples of Free Lie Algebra

Generalized Riemann Integral: Bounded Nonexample?

Existence Adjoint Operator: Boundedness?

What would be an example such that $\langle a\rangle\langle b\rangle \neq \langle ab\rangle$?

Does existence of non-trivial solution of $S(x,y,z) = 0, \; S(y,z,x) = 0, \; S(z,x,y) = 0$ implies existence of trivial solution at $x=y=z$ axis?

Is a ring $R$ factorial $\iff$ $R[X]$ factorial?

Just How Strong is Associativity?

Does a continuous point-wise limit imply uniform convergence?

Find ideal defining $Gr_2(\mathbb{C}^5)$ in Pluker embedding

What do the operator semigroups have to do with PDE's?

Is this question wrong? Sequence of polynomial approximates $\sin$

First Countable Spaces are Hausdorff or Not?

Example (?) of a Banach space containing an uncomplemented copy of itself

Example of Hausdorff and Second Countable Space that is Not Metrizable

Nonmeasurable Functions

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