List questions from examples-counterexamples

Published on 10 Apr 2016 - 18:17

1.2k

Views

A nonmeasurable function such that $|f|$ is measurable, and the preimage of every point is measurable

Published on 10 Apr 2016 - 19:55

1.3k

Views

example of quasi-transitive relation that is not transitive

Published on 11 Apr 2026 - 12:45

219

Views

Is there any function in $L^2$ that is not integrable?

Published on 12 Apr 2026 - 11:59

194

Views

need an example for an ode system with 3 limit cycles

Published on 14 Apr 2016 - 7:59

625

Views

Is the set of differentiable points of a monotonic function Borel-measurable?

Published on 12 Apr 2026 - 20:12

2.2k

Views

Examples of a quotient map not closed and quotient space not Hausdorff

Published on 27 Mar 2026 - 10:46

3.3k

Views

Quotient map that is not closed

Published on 25 Mar 2026 - 17:41

2.3k

Views

Proof intersection is finite and non-empty

Published on 16 Apr 2016 - 21:33

1.1k

Views

Results on "subtraction" of measures and outer measures?

Published on 10 Apr 2026 - 8:54

306

Views

inflexion points of a composition of functions

Published on 11 Apr 2026 - 0:03

344

Views

Example of a field extension $K/F$ such that $K$ is the splitting field of some (non-separable) polynomial in $F$, but not Galois over $F$?

Published on 23 Apr 2016 - 1:25

244

Views

Proving not an equivalence relation -the basic case

Published on 28 Mar 2026 - 11:25

342

Views

Sequence of bounded Operators (Is this a counterexample?)

Published on 23 Apr 2016 - 20:02

54

Views

two ways of counting

Published on 11 Apr 2026 - 12:17

List Question

A non metric first countable topological space

A nonmeasurable function such that $|f|$ is measurable, and the preimage of every point is measurable

example of quasi-transitive relation that is not transitive

Is there any function in $L^2$ that is not integrable?

need an example for an ode system with 3 limit cycles

Is the set of differentiable points of a monotonic function Borel-measurable?

Examples of a quotient map not closed and quotient space not Hausdorff

Quotient map that is not closed

Proof intersection is finite and non-empty

Results on "subtraction" of measures and outer measures?

inflexion points of a composition of functions

Example of a field extension $K/F$ such that $K$ is the splitting field of some (non-separable) polynomial in $F$, but not Galois over $F$?

Proving not an equivalence relation -the basic case

Sequence of bounded Operators (Is this a counterexample?)

two ways of counting

Trending Questions

Popular # Hahtags

Popular Questions