Sandipan Dey's user avatar
Sandipan Dey's user avatar
Sandipan Dey's user avatar
Sandipan Dey
  • Member for 6 years, 2 months
  • Last seen this week
8 votes

unbiased estimate of the covariance

4 votes

derivative of cost function for Logistic Regression

4 votes

Computing a limit of a sum mixed with product.

3 votes

Stochastic Processes: Markov Chains

3 votes

Convexity of a function in $\mathbb{R^2}$

3 votes
Accepted

Find the Fisher Information of $X\sim{\rm Poisson}(\mu)$

3 votes

The median minimizes the sum of absolute deviations (the $ {\ell}_{1} $ norm)

2 votes

Upper bound of product

2 votes

Probability of majority votes being correct

2 votes

maximise area under constraints

2 votes
Accepted

$\frac{1}{n}\sum_{k=1}^n E(X_k) \leqslant E(max(X_1, · · · ,X_n))$

2 votes
Accepted

Entropy rate of a finite repetition

2 votes
Accepted

Calculating $P(X_n\ge 0)$, for $n = 1, 2, 3, 4$ in a random walk

2 votes

Number of onto functions

2 votes
Accepted

How to prove that $\sqrt{n}(\ln S_n-\mu)$ converges in law to $\mathcal N(0,\sigma^2)$ where$S_n$is the logarithm of geometric mean of some iid $X_i$?

2 votes
Accepted

prove that Petersen graph has no cycles less than or equal to 4

2 votes

Drawing the grid without lifting the pen

2 votes
Accepted

Minimum Edge Cover of the Hypercube

2 votes
Accepted

For which values of $a$ does this system of equations $\mathbf{{not}}$ have a unique solution?

2 votes

Number Theory $a$ coprime with 10

2 votes
Accepted

Is this a combinations or permutations problem?

2 votes

Python coding with numpy sympy

2 votes

Partial derivatives of $|Ax - b|^2$?

2 votes
Accepted

Maximize $\binom{N-m}{n-k}/\binom{N}{n}$ with respect to $N$

2 votes
Accepted

Evaluating $\lim_{n \to \infty}\left(\frac{n}{n^3+1}+\frac{2n}{n^3+2}+ \dots + \frac{n^2}{n^3+n}\right)$

2 votes
Accepted

How is a bigram defined mathematically?

2 votes

Counting Paths using combinations and permutations

2 votes
Accepted

Similarity of $P^{-1}AP^{-T}$, $P^{-T}P^{-1}A$, and $AP^{-T}P^{-1}$

2 votes

Number of roots of the equation $ax^2+ bx + c = 0$ in $(1,2)$

2 votes
Accepted

Explain notation $P\left(\underset{1\le i\le n}{\max} X_i > 2\log{n} \right) = P\left( \bigcup_{i=1}^n\{X_i > 2\log(n)\} \right)$

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