User Pegi

13 votes

1 answer

128 views

Understanding Legendre transform (and convex conjugate)

asked May 20 at 9:36

6 votes

1 answer

146 views

Find a sequence of measures and a measurable function

functional-analysis analysis measure-theory measurable-functions borel-measures

asked Jul 14, 2021 at 12:49

5 votes

0 answers

115 views

Joint distribution from marginals

probability probability-distributions expected-value marginal-distribution

asked Nov 19, 2021 at 11:32

3 votes

2 answers

87 views

Prove that all the numbers in the table are even.

discrete-mathematics puzzle invariance

asked Oct 9, 2019 at 7:22

2 votes

4 answers

118 views

If $m \equiv 5\mod 10 $ prove that $1991 \mid 12^m + 9^m + 8^m + 6^m$

number-theory elementary-number-theory modular-arithmetic

asked Dec 7, 2019 at 7:51

1 vote

2 answers

91 views

What is the number of the players in the tournament? (Logic puzzle)

discrete-mathematics logic

asked Oct 1, 2019 at 13:50

1 vote

1 answer

36 views

For what value of $c$ is $f(x,y)$ a probability density function?

probability probability-distributions indefinite-integrals gamma-distribution

asked Oct 12, 2019 at 17:48

1 vote

2 answers

80 views

How to prove that for every $i$, $a_i = i$

number-theory elementary-number-theory

asked Sep 27, 2019 at 18:30

0 votes

1 answer

140 views

How to find all the continuous functions satisfying an equation? [duplicate]

real-analysis calculus functions real-numbers functional-equations

asked Sep 29, 2019 at 19:50

0 votes

0 answers

38 views

Proving $X= f^{-1}[f[X]]$

elementary-set-theory inverse

asked Nov 24, 2017 at 17:33

0 votes

1 answer

53 views

Prove that a line is a polyhedral set (can be made by a finite number of inequalities)

linear-algebra inequality convex-optimization linear-programming

asked Oct 19, 2019 at 15:05

0 votes

1 answer

38 views

Prove that a finite number of inequalities make a line in R^n.

linear-algebra inequality

asked Oct 19, 2019 at 18:18

0 votes

2 answers

58 views

Find W has the beta distribution [closed]

probability probability-distributions beta-function

asked Jan 27, 2020 at 21:44

0 votes

1 answer

38 views

Prove $A$ and $[0,1] \cup [2,4]$ are homemorphic if and only if

real-analysis general-topology

asked Dec 16, 2020 at 8:56

-1 votes

1 answer

55 views

$A$ is compact and closed then prove ...

real-analysis compactness closed-form

asked Dec 10, 2018 at 6:04

-3 votes

3 answers

103 views

Prove that there are 2 numbers whose difference is divisible by 2n. [closed]

elementary-number-theory discrete-mathematics invariance

asked Oct 9, 2019 at 8:05

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16 Questions

Understanding Legendre transform (and convex conjugate)

Find a sequence of measures and a measurable function

Joint distribution from marginals

Prove that all the numbers in the table are even.

If $m \equiv 5\mod 10 $ prove that $1991 \mid 12^m + 9^m + 8^m + 6^m$

What is the number of the players in the tournament? (Logic puzzle)

For what value of $c$ is $f(x,y)$ a probability density function?

How to prove that for every $i$, $a_i = i$

How to find all the continuous functions satisfying an equation? [duplicate]

Proving $X= f^{-1}[f[X]]$

Prove that a line is a polyhedral set (can be made by a finite number of inequalities)

Prove that a finite number of inequalities make a line in R^n.

Find W has the beta distribution [closed]

Prove $A$ and $[0,1] \cup [2,4]$ are homemorphic if and only if

$A$ is compact and closed then prove ...

Prove that there are 2 numbers whose difference is divisible by 2n. [closed]