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nz_
  • Member for 9 years
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12 votes
4 answers
927 views

Book recommendation for masters student with no maths background

9 votes
3 answers
2k views

Absolute value graph sketching: $||x-1|-1|$

8 votes
3 answers
380 views

Series of squares of n integers - where is the mistake?

8 votes
2 answers
909 views

Generalizing the Leibniz rule

6 votes
4 answers
489 views

Relation between signs of imaginary parts of $(x+iy)$ and $\sqrt{x+iy}$

6 votes
3 answers
942 views

$\mathbb{R}$ is uncountable, Abbott's proof

6 votes
3 answers
211 views

Can someone help me finish this: evaluate $S_n = \frac{x}{1-x^2}+\frac{x^2}{1-x^4}+ ... + \frac{x^{2^{n-1}}}{1-x^{2^{n}}}$ [duplicate]

6 votes
3 answers
372 views

A coin game - is it a group?

5 votes
4 answers
11k views

Transpose of a projection matrix

5 votes
3 answers
561 views

Alternative area of a triangle formula

4 votes
1 answer
343 views

Standard Wiener process continuity

4 votes
1 answer
361 views

General equation for the change of variable (random variables' functions)

4 votes
3 answers
278 views

Negation of a statement about polynomials

4 votes
1 answer
1k views

Moore-Penrose pseudoinverse solution of a system of linear equations

4 votes
1 answer
474 views

Holder Inequality proof dead end

4 votes
1 answer
482 views

What is a characterisation function

3 votes
0 answers
460 views

Backpropagation - softmax derivative

3 votes
2 answers
1k views

Limit of $\sin(\pi \sqrt{4n^2+n})$

3 votes
2 answers
58 views

Find $c$ and $n$ such that $\frac{x^3 \arctan x}{x^4 + \cos x +3} \sim cx^n$ as $x \to 0$

3 votes
2 answers
242 views

Functions of random variables explanation

3 votes
2 answers
110 views

How should I understand $\displaystyle\sum_k f(k) \approx \int dk \ f(k)$?

3 votes
0 answers
98 views

How can an Ornstein-Uhlenbeck process be shown to be continuous/diffusion?

3 votes
1 answer
1k views

The sum of integers in each row / column / major diagonal of a Magic Square of order $N$ is $\dfrac{N(N^2+1)}{2}$

3 votes
4 answers
381 views

Nature of the roots of quadratic equation

3 votes
2 answers
214 views

Mathematics Olympiad Question $a+b+c=7$, ...

3 votes
2 answers
2k views

3 balls into 3 cells problem

2 votes
2 answers
71 views

Event independence

2 votes
2 answers
117 views

Sum of binomial coefficients $\sum_{n=0}^6 \binom{6}{n} = 2^6$

2 votes
5 answers
173 views

Solve $y^3-3y-\sqrt{2}=0$ using trigonometry

2 votes
2 answers
91 views

Spotting substitution in $\int \frac{1}{(t+\cos \alpha)^2 + \sin^2 \alpha}$

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