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M Smith's user avatar
M Smith's user avatar
M Smith
  • Member for 9 years, 4 months
  • Last seen more than a month ago
9 votes
5 answers
5k views

Is this group of matrices cyclic? [closed]

8 votes
1 answer
40k views

Prove that in every graph with at least two vertices, there are at least two vertices which have the same degree? [duplicate]

7 votes
1 answer
6k views

Please can someone help me to understand stationary distributions of Markov Chains?

6 votes
1 answer
3k views

What is the (practical) difference between a stationary distribution and an equilibrium distribution of a MC?

6 votes
1 answer
3k views

What does 'central exposed to risk' mean?

5 votes
1 answer
746 views

How might I find, in parametric form, the solution to this (first order, quasilinear) PDE?

5 votes
1 answer
106 views

How can I evaluate this contour integral?

5 votes
4 answers
165 views

How can I 'prove' the derivative of this function?

5 votes
1 answer
69 views

How can I find the two critical points of this system of equations?

4 votes
3 answers
3k views

For a subgroup $H$ of a group $G$, how many cosets are there?

4 votes
1 answer
2k views

What does it mean to say that a vector is 'coordinate invariant'?

4 votes
1 answer
2k views

What does the notation $\Gamma \vDash \phi$ mean (in Mathematical Logic)?

4 votes
3 answers
1k views

What does the notation $q^k || n$ mean?

4 votes
1 answer
97 views

What does this notation mean in modular arithmetic?

4 votes
1 answer
86 views

How would you find $Y_1$ for the stochastic integral $dY_t = -Y_t \hspace{1mm} dW_t + Y_t \hspace{1mm} dt$?

4 votes
0 answers
463 views

How might I prove that LCM$(m) \geq 2^m$?

3 votes
1 answer
412 views

How would the stochastic integral $\int_0^1 2W_t \hspace{1mm} dW_t$ be distributed?

3 votes
2 answers
39 views

Show that if $X_k \sim N(a, \sigma^2)$ then $\sum_{k=1}^n X_k \sim N(na, n \sigma^2)$

3 votes
3 answers
134 views

Show that if $\eta \sim N(0, \sigma^2)$ then $\mathbb{E} [\eta^4] = 3 \sigma^4$?

3 votes
11 answers
2k views

What are the best introductions on analysis, to read for leisure?

3 votes
2 answers
2k views

What is meant by 'domain of interpretation' in mathematical logic?

3 votes
1 answer
5k views

Can someone please explain the difference between first/second/third order logic, using examples?

3 votes
4 answers
6k views

How can I find ALL complex roots of $z^4 + 1 = 0$? [duplicate]

3 votes
1 answer
60 views

Why is this the general solution to this system of linear partial differential equations?

3 votes
1 answer
1k views

What does the notation $[\boldsymbol{A} | \boldsymbol{B} ]$ mean (line through a matrix)?

3 votes
2 answers
5k views

Is there an easy way to find the (number of) subgroups of a given group?

3 votes
2 answers
2k views

Can anyone help me understand Lagrange Multipliers?

3 votes
4 answers
2k views

What does the term "up to isomorphism" mean in this context? [duplicate]

3 votes
1 answer
112 views

How could index notation be used to prove this identity?

3 votes
1 answer
891 views

How can you show that 2 (adjacency) matrices are isomorphic?

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