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user351797
  • Member for 8 years
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6 votes
2 answers
234 views

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

5 votes
1 answer
746 views

The completeness relation from QM in terms of inner products

5 votes
3 answers
31k views

eigenvectors of a triangular matrix

5 votes
2 answers
303 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

4 votes
4 answers
4k views

Variation of parameters with nonconstant coefficients

4 votes
1 answer
891 views

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

4 votes
3 answers
154 views

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

4 votes
1 answer
144 views

Definition of subgroup generated by a set

3 votes
2 answers
327 views

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

3 votes
2 answers
140 views

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

3 votes
1 answer
553 views

Definition for simplicial complex

3 votes
3 answers
74 views

Check solution to DE

3 votes
1 answer
123 views

Partial derivative isn't continuous

3 votes
2 answers
376 views

Computing differential operator after change of coordinates

3 votes
5 answers
5k views

Distance between surfaces

2 votes
2 answers
1k views

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

2 votes
2 answers
87 views

hint on stokes' theorem problem

2 votes
3 answers
347 views

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

2 votes
1 answer
85 views

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

2 votes
0 answers
316 views

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

2 votes
1 answer
27 views

Law of contravariance for vectors

1 vote
1 answer
172 views

Hermite differential equation

1 vote
1 answer
241 views

Inequality used in computing Fresnel Integral

1 vote
3 answers
108 views

Trigonometric substitution hint

1 vote
1 answer
41 views

Interpretations and Peano arithmetic

1 vote
1 answer
178 views

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

1 vote
1 answer
154 views

Cofinal sets and different definitions

1 vote
2 answers
143 views

tangent to a level surface

1 vote
1 answer
191 views

Determining $dA$ in general

1 vote
2 answers
134 views

What is the derivative of $\frac{1}{(1-x)^2}$?