User user351797

6 votes

2 answers

196 views

Prove that $(x+1)^x-x^x(x-1)$ only has one (real) root

asked Jun 6, 2019 at 0:56

5 votes

1 answer

628 views

The completeness relation from QM in terms of inner products

asked Jul 22, 2016 at 0:34

5 votes

2 answers

275 views

Problem in showing $\lim_{(x,y)\to (0,0)} \frac{12x^3y^5+4x^4y^4}{x^6+4y^8}=0$ using polar coordinates

asked Jan 26, 2017 at 6:26

4 votes

4 answers

3k views

Variation of parameters with nonconstant coefficients

asked Nov 15, 2016 at 0:02

4 votes

1 answer

661 views

Limit of $n$-Cesaro summation as $n \to \infty$

asked Aug 22, 2017 at 3:49

4 votes

3 answers

152 views

Roots of $2x^3-4x+1$

asked Oct 2, 2018 at 3:13

4 votes

1 answer

139 views

Definition of subgroup generated by a set

asked Nov 3, 2018 at 1:03

3 votes

2 answers

263 views

flux of $\langle x,y,z^2\rangle$ across unit sphere

asked Dec 28, 2018 at 23:43

3 votes

2 answers

124 views

showing that $|u|$ is invertible whenever $u$ is in a C* algebra

asked Feb 21, 2018 at 3:26

3 votes

1 answer

505 views

Definition for simplicial complex

asked Nov 20, 2016 at 6:36

3 votes

3 answers

67 views

Check solution to DE

asked Dec 9, 2016 at 7:42

3 votes

1 answer

111 views

Partial derivative isn't continuous

asked Dec 18, 2016 at 7:07

3 votes

2 answers

295 views

Computing differential operator after change of coordinates

asked Jan 30, 2017 at 20:35

3 votes

5 answers

4k views

Distance between surfaces

asked Jan 9, 2017 at 0:24

2 votes

2 answers

935 views

If $F$ is conservative.... does $\mathrm{curl}(F)$ really equal zero?

asked Dec 26, 2016 at 20:34

2 votes

2 answers

83 views

hint on stokes' theorem problem

asked Dec 29, 2016 at 5:00

2 votes

3 answers

27k views

eigenvectors of a triangular matrix

asked Oct 16, 2016 at 20:38

2 votes

3 answers

330 views

$(P \wedge Q \rightarrow R) \leftrightarrow (P \wedge \lnot R \rightarrow \lnot Q)$

asked Sep 8, 2017 at 19:28

2 votes

1 answer

73 views

Do a pair of orthogonal directions with slopes equal to zero imply $\nabla f = 0$?

asked Oct 5, 2018 at 19:31

2 votes

0 answers

294 views

solving an inexact differential equation when an integrating factor cannot be found

asked May 20, 2018 at 16:05

2 votes

1 answer

26 views

Law of contravariance for vectors

asked Feb 22, 2017 at 4:40

1 vote

1 answer

166 views

Hermite differential equation

asked Nov 24, 2018 at 15:49

1 vote

1 answer

217 views

Inequality used in computing Fresnel Integral

asked Jun 2, 2018 at 16:46

1 vote

3 answers

107 views

Trigonometric substitution hint

asked Mar 11, 2018 at 2:13

1 vote

1 answer

35 views

Interpretations and Peano arithmetic

asked Mar 12, 2018 at 22:39

1 vote

1 answer

118 views

set theory notation $\in \uparrow$ in set theory

asked Apr 2, 2018 at 22:01

1 vote

1 answer

140 views

Cofinal sets and different definitions

asked Apr 5, 2018 at 17:55

1 vote

2 answers

208 views

Are group actions open?

asked Nov 12, 2016 at 18:14

1 vote

1 answer

112 views

Integrating Factor in two different settings

asked Aug 20, 2016 at 16:02

1 vote

2 answers

2k views

integrate a fraction of trig functions

asked Sep 1, 2016 at 4:41

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47 Questions

Prove that $(x+1)^x-x^x(x-1)$ only has one (real) root

The completeness relation from QM in terms of inner products

Problem in showing $\lim_{(x,y)\to (0,0)} \frac{12x^3y^5+4x^4y^4}{x^6+4y^8}=0$ using polar coordinates

Variation of parameters with nonconstant coefficients

Limit of $n$-Cesaro summation as $n \to \infty$

Roots of $2x^3-4x+1$

Definition of subgroup generated by a set

flux of $\langle x,y,z^2\rangle$ across unit sphere

showing that $|u|$ is invertible whenever $u$ is in a C* algebra

Definition for simplicial complex

Check solution to DE

Partial derivative isn't continuous

Computing differential operator after change of coordinates

Distance between surfaces

If $F$ is conservative.... does $\mathrm{curl}(F)$ really equal zero?

hint on stokes' theorem problem

eigenvectors of a triangular matrix

$(P \wedge Q \rightarrow R) \leftrightarrow (P \wedge \lnot R \rightarrow \lnot Q)$

Do a pair of orthogonal directions with slopes equal to zero imply $\nabla f = 0$?

solving an inexact differential equation when an integrating factor cannot be found

Law of contravariance for vectors

Hermite differential equation

Inequality used in computing Fresnel Integral

Trigonometric substitution hint

Interpretations and Peano arithmetic

set theory notation $\in \uparrow$ in set theory

Cofinal sets and different definitions

Are group actions open?

Integrating Factor in two different settings

integrate a fraction of trig functions