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SiXUlm
  • Member for 11 years, 4 months
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18 votes
3 answers
3k views

Intuition behind filter on a set

8 votes
1 answer
2k views

"Non-linear" algebra

6 votes
2 answers
6k views

Rational solutions of $x^2 - 5 = y^2$, $x^2 + 5 = z^2$

4 votes
2 answers
373 views

References on probability theory, stochastic processes, Monte Carlo and convex optimisation, with similar writing style to Terence Tao

4 votes
1 answer
341 views

Path connectedness and convexity of some sets of matrices

3 votes
1 answer
1k views

Derivation of Fourier transform of Heaviside function

3 votes
2 answers
226 views

Show a specially defined matrix is positive definite

2 votes
1 answer
624 views

Differentiable function whose derivative is null at at-most countable points

2 votes
1 answer
204 views

Odd polynominal

2 votes
0 answers
94 views

Given $2$ closed subsets whose union and intersection are path connected. Show that each subset is path connected.

2 votes
2 answers
2k views

The shortest path in a metric space with a given metric

1 vote
1 answer
169 views

Proof of Baire category theorem in Tao's "Real analysis"

1 vote
1 answer
279 views

Relation between Genetic Algorithm and Information theory

1 vote
0 answers
62 views

Generalization of a class of sets

1 vote
0 answers
91 views

Decomposition of ball in Banach Tarski paradox and covering a soccer ball

1 vote
0 answers
1k views

Unbiased estimators of skewness and kurtosis

1 vote
1 answer
537 views

Why union and intersection can be interchanged in this situation?

1 vote
0 answers
46 views

Derivation of First order derivation of Fourier transform

1 vote
0 answers
77 views

Optimisation under constraint of Wasserstein distance

1 vote
0 answers
85 views

Find all natural numbers of the form $2^n$ whose all digits are even

0 votes
3 answers
501 views

Everything in math that we have found and proved to be TRUE so far will remain true forever?

0 votes
1 answer
55 views

A question on measurable space and $\sigma$-algebra generated by a familly of subsets

0 votes
1 answer
102 views

Prove a subgroup is normal [duplicate]

0 votes
1 answer
36 views

A question on metric space $(\mathbb{N},d)$, where $d: \mathbb{N} \times \mathbb{N} \mapsto \mathbb{R^+} $

0 votes
1 answer
744 views

Exercise in prof Tao's "Introduction to measure theory"

0 votes
2 answers
499 views

A commutative ring with unit element, which only has a finite number of ideals, is a field

0 votes
1 answer
66 views

Simple but useful drawing softwares which fit for secondary student

-2 votes
1 answer
42 views

From a uniform integer random variable on $[1,5]$, generate a uniform integer random variable on $[1,7]$