User Dilip Sarwate - Mathematics Stack Exchange

45 votes

Prove that if $g^2=e$ for all $g$ in $G$ then $G$ is Abelian.

answered Nov 15, 2012 at 20:54

41 votes

Proof of upper-tail inequality for standard normal distribution

answered Oct 3, 2011 at 2:28

40 votes

Accepted

Sum of independent Gamma distributions is a Gamma distribution

answered Mar 14, 2013 at 18:23

30 votes

Accepted

How to calculate the expectation of $XY$?

answered Jan 4, 2012 at 20:38

30 votes

Accepted

Sum of Independent Folded-Normal distributions

answered Jun 25, 2013 at 4:01

25 votes

Accepted

why distribution function is right continuous?

answered Oct 4, 2013 at 3:01

24 votes

Accepted

maximum of two uniform distributions

answered Sep 17, 2013 at 3:01

22 votes

Accepted

Proof that $x \Phi(x) + \Phi'(x) \geq 0$ $\forall x$, where $\Phi$ is the normal CDF

answered Sep 23, 2011 at 14:47

21 votes

The mode of the Poisson Distribution

answered Nov 28, 2012 at 14:33

20 votes

Why do engineers use the Z-transform and mathematicians use generating functions?

answered Apr 26, 2012 at 11:11

20 votes

Research done by high-school students

answered Jul 23, 2012 at 0:34

20 votes

characteristic of a finite field

answered Oct 31, 2011 at 20:58

19 votes

Accepted

Are squares of independent random variables independent?

answered Oct 25, 2012 at 1:36

18 votes

Calculation of the Covariance of Gaussian Mixtures

answered Sep 14, 2012 at 23:19

17 votes

Probability that a $(n, \frac12)$-binomial random variable is even

answered Nov 17, 2011 at 14:37

17 votes

Prove that: $ \cot7\frac12 ^\circ = \sqrt2 + \sqrt3 + \sqrt4 + \sqrt6$

answered Aug 23, 2013 at 2:20

16 votes

Accepted

Intuition behind the concept of indicator random variables.

answered Aug 7, 2012 at 15:38

16 votes

Accepted

Roots of an irreducible polynomial in a finite field

answered Jul 3, 2012 at 22:52

15 votes

Accepted

What is Galois Field

answered Oct 19, 2011 at 19:12

14 votes

Intuition behind using complementary CDF to compute expectation for nonnegative random variables

answered Sep 13, 2011 at 16:12

13 votes

Accepted

Proof that the sum of two Gaussian variables is another Gaussian

answered Sep 19, 2011 at 19:14

13 votes

Accepted

Finding the values of $n$ for which $\mathbb{F}_{5^{n}}$, the finite field with $5^{n}$ elements, contains a non-trivial $93$rd root of unity

answered May 23, 2012 at 11:17

13 votes

Accepted

Intuition behind Chebyshev's inequality

answered Jun 30, 2015 at 16:25

12 votes

Accepted

CRC computation

answered Sep 20, 2011 at 16:35

12 votes

Accepted

derivative of expected value with respect to parameter in both pdf and expectation

answered Jan 12, 2016 at 6:17

11 votes

Accepted

Mutually exclusive events

answered Jun 22, 2012 at 3:21

11 votes

Accepted

How to prove uniform distribution of $m\oplus k$ if $k$ is uniformly distributed?

answered Jul 12, 2013 at 12:09

11 votes

Accepted

Prove Parseval for the Fourier transform

answered Mar 27, 2013 at 3:22

10 votes

Integral involving the CDF of normal distribution

answered Jun 8, 2013 at 1:43

10 votes

Summation equation for $2^{x-1}$

answered Aug 8, 2012 at 11:46

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738 Answers

Prove that if $g^2=e$ for all $g$ in $G$ then $G$ is Abelian.

Proof of upper-tail inequality for standard normal distribution

Sum of independent Gamma distributions is a Gamma distribution

How to calculate the expectation of $XY$?

Sum of Independent Folded-Normal distributions

why distribution function is right continuous?

maximum of two uniform distributions

Proof that $x \Phi(x) + \Phi'(x) \geq 0$ $\forall x$, where $\Phi$ is the normal CDF

The mode of the Poisson Distribution

Why do engineers use the Z-transform and mathematicians use generating functions?

Research done by high-school students

characteristic of a finite field

Are squares of independent random variables independent?

Calculation of the Covariance of Gaussian Mixtures

Probability that a $(n, \frac12)$-binomial random variable is even

Prove that: $ \cot7\frac12 ^\circ = \sqrt2 + \sqrt3 + \sqrt4 + \sqrt6$

Intuition behind the concept of indicator random variables.

Roots of an irreducible polynomial in a finite field

What is Galois Field

Intuition behind using complementary CDF to compute expectation for nonnegative random variables

Proof that the sum of two Gaussian variables is another Gaussian

Finding the values of $n$ for which $\mathbb{F}_{5^{n}}$, the finite field with $5^{n}$ elements, contains a non-trivial $93$rd root of unity

Intuition behind Chebyshev's inequality

CRC computation

derivative of expected value with respect to parameter in both pdf and expectation

Mutually exclusive events

How to prove uniform distribution of $m\oplus k$ if $k$ is uniformly distributed?

Prove Parseval for the Fourier transform

Integral involving the CDF of normal distribution

Summation equation for $2^{x-1}$