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glowstonetrees
  • Member for 6 years, 5 months
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6 votes
0 answers
170 views

Non-unique solution of first order PDE

5 votes
3 answers
1k views

Change of variables and the partial derivative

5 votes
0 answers
96 views

Appropriate boundary conditions of the wave equation

5 votes
1 answer
1k views

Finding the stable, unstable, center manifolds of a nonlinear system

5 votes
1 answer
1k views

Show that there are infinitely many positive integers that are not the sum of $15$ fourth powers

5 votes
0 answers
111 views

Solving the heat equation via Laplace Transform

4 votes
1 answer
185 views

Solving a first order hyperbolic PDE in two variables

4 votes
2 answers
2k views

If a tree has $n$ vertices, then it must have a path with at least $k$ vertices or at least $n/k$ leaves

4 votes
1 answer
1k views

Laplace convolution with the Bessel function

3 votes
0 answers
570 views

Heat equation using the Laplace Transform

3 votes
0 answers
271 views

Bifurcation with two parameters

3 votes
1 answer
226 views

Existence of solution for ODE

3 votes
1 answer
397 views

MLE of $\mu$ when $X_1,\ldots,X_n$ are i.i.d $N(\mu,\mu^2)$

3 votes
1 answer
3k views

$G$ has a perfect matching if $G$ is bipartite and all vertices have the same degree

3 votes
1 answer
229 views

Prove inner-product inequality $\Bigl (\sum_{i=1}^k \langle u\;,\;e_i \rangle \langle v\;,\;e_i \rangle \Bigr)^2≤ \Vert u \Vert^2 \, \Vert v \Vert^2$ [duplicate]

3 votes
2 answers
864 views

Given the characteristic polynomial, find the minimal polynomial.

3 votes
2 answers
426 views

Every continuous function $f$ on the unit sphere (shell) has a point $p$ such that $f(p)=f(-p)$

3 votes
1 answer
313 views

Find the maximum velocity of this particle

3 votes
1 answer
92 views

Asymptotic expansion of $\ln (1-\ln(\varepsilon))$

3 votes
2 answers
291 views

ODE with nested boundary layers

3 votes
1 answer
377 views

Banach Space with coercive bilinear form is a Hilbert Space

2 votes
1 answer
227 views

Show that $\|A\|_{\infty} \leq \sqrt n \|A\|_2$

2 votes
2 answers
157 views

The norm $\|S-Q\|_F$ where $Q$ is orthogonal is minimised by $Q=I$

2 votes
2 answers
2k views

Poisson Process: Time until next arrival

2 votes
2 answers
254 views

Asymptotic approximation of $\int_0^x \exp(t^3) \, dt$ as $x\rightarrow \infty$

2 votes
1 answer
80 views

Find the value of $f''(0)$ to leading order

2 votes
1 answer
63 views

Question about notation: The order notation

2 votes
2 answers
1k views

Probability of being at given state in a continuous time Markov chain

2 votes
1 answer
102 views

Evaluating $I = \iint_D (x+y)\, dy\,dx$ using Green's Theorem

2 votes
1 answer
400 views

Re: Find all primes $p$ such that $\phi(x)=x^{13}$ is a homomorphism $\Bbb Z/p\Bbb Z \rightarrow \Bbb Z/p\Bbb Z$. [duplicate]