User Open Season

6 votes

1 answer

307 views

Maurice Frechet's 1904 Definitions of Compactness

asked Nov 30, 2013 at 2:28

6 votes

2 answers

131 views

Putting objects in a line.

combinatorics problem-solving

asked Jul 14, 2014 at 2:02

5 votes

2 answers

264 views

Is this Harmonic Polynomial Identically Zero?

complex-analysis harmonic-functions

asked Nov 15, 2013 at 3:16

4 votes

2 answers

70 views

What is the module structure here?

abstract-algebra modules tensor-products

asked Feb 5, 2015 at 1:35

4 votes

2 answers

79 views

How can I show that this sequence of integrals tends to the value $\infty$?

calculus real-analysis integration improper-integrals

asked Mar 9, 2016 at 22:25

4 votes

1 answer

88 views

Modeling particles moving through a chamber

ordinary-differential-equations physics mathematical-modeling

asked Jul 4, 2016 at 1:53

4 votes

1 answer

209 views

Distance between two particles traveling the same curve

calculus real-analysis curves

asked Sep 5, 2017 at 17:59

4 votes

0 answers

179 views

Show that $f * F$ is locally integrable

real-analysis integration convolution

asked Mar 1, 2018 at 21:44

3 votes

1 answer

139 views

If $f$ is a polynomial and $g(n+1)-g(n)=f(n)$, then $g$ is a polynomial. [closed]

functions polynomials commutative-algebra

asked Mar 28, 2016 at 16:58

3 votes

0 answers

79 views

Gradient of a function $f \colon L^2[0, 1] \rightarrow \mathbb{R}$.

real-analysis functional-analysis differential-geometry

asked Nov 7, 2017 at 17:50

3 votes

2 answers

772 views

Formula for the greatest common divisor of two odd numbers

number-theory elementary-number-theory

asked Mar 11, 2016 at 2:54

3 votes

2 answers

67 views

How can I verify the image and and the fibers of this map?

complex-analysis

asked Aug 9, 2014 at 18:56

3 votes

0 answers

2k views

What happens when the determinant of the Jacobian is zero?

calculus real-analysis multivariable-calculus

asked Oct 2, 2014 at 19:17

3 votes

2 answers

687 views

Every commutative subring is contained in a maximal commutative subring.

abstract-algebra commutative-algebra ring-theory

asked Nov 25, 2013 at 19:34

3 votes

1 answer

530 views

The Galois closure

field-theory galois-theory

asked Apr 8, 2014 at 21:30

3 votes

1 answer

730 views

To what extent is a function that is analytic on the unit disk determined by its boundary values?

complex-analysis continuity analyticity boundary-value-problem

asked Nov 9, 2013 at 21:23

2 votes

1 answer

52 views

Is this function part of the Galois group?

field-theory galois-theory finite-fields

asked Apr 10, 2014 at 17:14

2 votes

1 answer

438 views

Banach spaces: Convergence in terms of the Schauder basis.

functional-analysis banach-spaces

asked Apr 16, 2014 at 21:36

2 votes

1 answer

49 views

Rank of a Holomorphism

complex-geometry

asked Sep 17, 2014 at 1:32

2 votes

1 answer

81 views

Why is this proof incorrect? (Group Theory)

group-theory finite-groups

asked Oct 18, 2015 at 19:40

2 votes

2 answers

60 views

If a field element is simultaneously an $m$th and $n$th power... [closed]

field-theory

asked Jan 29, 2016 at 19:46

1 vote

1 answer

141 views

Does the splitting field of an irreducible polynomial contain all extensions over which the polynomial factors?

field-theory splitting-field

asked Jan 30, 2016 at 19:01

1 vote

1 answer

82 views

Is there a rational function $f$ satisfying $f(x) =f\left( \frac{1}{1-x} \right)$ for all $x$?

polynomials rational-functions

asked Feb 4, 2016 at 3:01

1 vote

1 answer

172 views

How does one compute quotients of $\Bbb Z$-modules?

abstract-algebra group-theory modules

asked Mar 19, 2016 at 22:35

1 vote

2 answers

58 views

What is $(1 + O(h))^{-1}$?

real-analysis

asked Feb 17, 2018 at 17:48

1 vote

1 answer

247 views

Fréchet derivative of a map from $\mathbb{R} \rightarrow L^2(\mathbb{R})$

real-analysis functional-analysis frechet-derivative

asked Sep 25, 2017 at 1:07

1 vote

1 answer

36 views

Can I find a Galois extension which contains a finite set of algebraic elements?

field-theory galois-theory extension-field

asked Jan 28, 2016 at 18:33

1 vote

1 answer

117 views

What does it mean to vanish at infinity faster than any power of $|x|$?

real-analysis

asked Feb 25, 2016 at 19:59

1 vote

1 answer

29 views

Find a sequence $a_f(k)$ so that $\sum_{k=1}^\infty a_f(k) \operatorname{sinc} (\pi k f) = 0$.

real-analysis sequences-and-series

asked Aug 9, 2018 at 19:29

1 vote

1 answer

63 views

Is a vector field a closed map?

smooth-manifolds

asked Oct 31, 2015 at 0:14

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58 Questions

Maurice Frechet's 1904 Definitions of Compactness

Putting objects in a line.

Is this Harmonic Polynomial Identically Zero?

What is the module structure here?

How can I show that this sequence of integrals tends to the value $\infty$?

Modeling particles moving through a chamber

Distance between two particles traveling the same curve

Show that $f * F$ is locally integrable

If $f$ is a polynomial and $g(n+1)-g(n)=f(n)$, then $g$ is a polynomial. [closed]

Gradient of a function $f \colon L^2[0, 1] \rightarrow \mathbb{R}$.

Formula for the greatest common divisor of two odd numbers

How can I verify the image and and the fibers of this map?

What happens when the determinant of the Jacobian is zero?

Every commutative subring is contained in a maximal commutative subring.

The Galois closure

To what extent is a function that is analytic on the unit disk determined by its boundary values?

Is this function part of the Galois group?

Banach spaces: Convergence in terms of the Schauder basis.

Rank of a Holomorphism

Why is this proof incorrect? (Group Theory)

If a field element is simultaneously an $m$th and $n$th power... [closed]

Does the splitting field of an irreducible polynomial contain all extensions over which the polynomial factors?

Is there a rational function $f$ satisfying $f(x) =f\left( \frac{1}{1-x} \right)$ for all $x$?

How does one compute quotients of $\Bbb Z$-modules?

What is $(1 + O(h))^{-1}$?

Fréchet derivative of a map from $\mathbb{R} \rightarrow L^2(\mathbb{R})$

Can I find a Galois extension which contains a finite set of algebraic elements?

What does it mean to vanish at infinity faster than any power of $|x|$?

Find a sequence $a_f(k)$ so that $\sum_{k=1}^\infty a_f(k) \operatorname{sinc} (\pi k f) = 0$.

Is a vector field a closed map?