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fstab
  • Member for 8 years, 6 months
  • Last seen more than 1 year ago
  • Amsterdam, Netherlands
5 votes
1 answer
8k views

How to calculate entropy from a set of samples?

3 votes
1 answer
88 views

Constrained nonlinear optimization

3 votes
3 answers
2k views

Any good introductory book/tutorial on Fourier Transform (up to FFT) with plenty of exercises and solutions?

2 votes
2 answers
801 views

Row echelon form of (augmented) matrix. Is there something wrong with Sage's implementation?

2 votes
0 answers
194 views

Reducing a linear algebra expression to quadratic form

2 votes
1 answer
4k views

What is the maximum amount of eigenvectors that a square matrix n x n might have?

2 votes
3 answers
111 views

Fun problem. Apparently $\prod_i(1-p_i) \geq 1 - \sum_ip_i$ with $p_i \in [0,1]$ is always true. But how to demonstrate it?

2 votes
2 answers
358 views

If $g$ is a function of the random variable $X$, is it true that $H(X) = H(X) + H(g(X)\mid X)$?

1 vote
2 answers
271 views

stuck on logarithm of derivative of sum $\frac{\partial\mathrm{log}(a+b)}{\partial a}$

1 vote
1 answer
7k views

Stuck on derivative of logarithm of sum of exponentials

1 vote
2 answers
298 views

Given a Markov chain $X \rightarrow Y \rightarrow Z$, why is $I(X;Y|Z) \leq I(X;Y)$?

1 vote
2 answers
85 views

being $\mathbf{w}$ a vector, how do I calculate the derivative of $\mathbf{w}^T\mathbf{w}$?

1 vote
0 answers
41 views

Integrating an expression over a vector $\mathbf{w}$

0 votes
0 answers
43 views

being $\mathbf{a}$ and $\mathbf{b}$ two vectors with same length, how do I expand $(\mathbf{a}^T\mathbf{b})^2$?

0 votes
1 answer
49 views

maximum-likelihood: a sequence of events described by a Bernoulli distribution

0 votes
1 answer
734 views

Is a traditional Multi Layer Perceptron Network capable of non-linear regression? Which activation function should be used for that purpose?

0 votes
1 answer
39 views

name of plot for discrete joint probability (table) visualizing black squares of varying size per cell

0 votes
1 answer
118 views

How to prove Markov's inequality $P_X(X\geq t) \leq \frac{\mathbb{E}[X]}{t}$?

0 votes
1 answer
322 views

Markov chain: if $X\rightarrow Y\rightarrow Z$, then why is $Z\rightarrow Y\rightarrow X$ true?

0 votes
1 answer
120 views

What is the exact meaning of $I(X;Y|Z)$ in Information Theory?

0 votes
0 answers
85 views

How to identify what probability distribution this is?

0 votes
0 answers
120 views

How to efficiently select a subset of elements that maximizes a certain property? (entropy)