User Flounderer

10 votes

Fun but serious mathematics books to gift advanced undergraduates.

answered Dec 25, 2012 at 19:15

10 votes

Jigsaw Puzzle Help

answered Sep 1, 2013 at 21:24

9 votes

Meaning of the identity $\det(A+B)+\text{tr}(AB) = \det(A)+\det(B) + \text{tr}(A)\text{tr}(B)$ (in dimension $2$)

answered May 5, 2015 at 6:40

8 votes

Accepted

Does "Big Data" Have a Ramsey Theory Problem?

answered Oct 20, 2013 at 1:41

5 votes

Accepted

What's the last step in this proof of the uniqueness of equalizers?

answered Jan 16, 2014 at 7:24

5 votes

Maximizing the value of $\int_0^1 f(x)f^{-1}(x)\ \mathrm dx$

answered Oct 14, 2020 at 3:40

4 votes

Probability Riddle

answered Apr 5, 2016 at 1:58

3 votes

Accepted

How does the posterior of a dirac prior look like?

answered Apr 29, 2016 at 3:02

3 votes

Functional equation: $R(1/x)/x^2 = R(x) $

answered Jul 22, 2013 at 2:50

3 votes

Looking for a particular advanced high school book; forgot author and title

answered Mar 12, 2021 at 3:22

3 votes

Pullback, 2-form invariant

answered Mar 26, 2021 at 7:32

3 votes

Which Deck wins the most?

answered Jul 15, 2021 at 2:44

2 votes

Statistics Hypothesis Testing finding out test stat and critical value

answered Mar 29, 2017 at 2:42

2 votes

How to solve $\lvert{x}\rvert - \lvert{2+x}\rvert = x$?

answered Oct 29, 2015 at 4:41

2 votes

Accepted

Expected value of ejecting balls from a jar

answered Aug 3, 2013 at 8:58

2 votes

Functional equation: $R(1/x)/x^2 = R(x) $

answered Dec 10, 2013 at 22:42

2 votes

nilradical of a quotient ring

answered Sep 26, 2013 at 1:28

2 votes

Exciting games and material to motivate children to math

answered Nov 14, 2011 at 20:50

2 votes

Is there any way to define arithmetical multiplication as other thing than repeated addition?

answered May 11, 2015 at 3:39

1 vote

Two similar method to calculate one equation get different answer

answered Aug 5, 2015 at 5:26

1 vote

Sum of a random number of non-identically distributed random variables

answered Feb 7, 2017 at 4:10

1 vote

Accepted

Why $(v+1)^{-2}$ is F distribution with (2,2) degree of freedom?

answered Mar 16, 2017 at 4:17

1 vote

Accepted

Accepting or rejecting $H_0$ for a different size of sample

answered Dec 23, 2013 at 18:58

1 vote

Accepted

Converse of the British Flag Theorem

answered Aug 15, 2013 at 1:46

1 vote

Probability of an even number of sixes

answered Feb 10, 2016 at 4:25

0 votes

Accepted

Finding probability of a sample using Bayesian Inference

answered Mar 21, 2016 at 3:25

0 votes

Let $R$ be a ring with $1_R$, $u = a + x $ is a unit and $x \in J(R)$, prove $a$ is a unit.

answered Apr 9, 2021 at 3:08

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27 Answers

Fun but serious mathematics books to gift advanced undergraduates.

Jigsaw Puzzle Help

Meaning of the identity $\det(A+B)+\text{tr}(AB) = \det(A)+\det(B) + \text{tr}(A)\text{tr}(B)$ (in dimension $2$)

Does "Big Data" Have a Ramsey Theory Problem?

What's the last step in this proof of the uniqueness of equalizers?

Maximizing the value of $\int_0^1 f(x)f^{-1}(x)\ \mathrm dx$

Probability Riddle

How does the posterior of a dirac prior look like?

Functional equation: $R(1/x)/x^2 = R(x) $

Looking for a particular advanced high school book; forgot author and title

Pullback, 2-form invariant

Which Deck wins the most?

Statistics Hypothesis Testing finding out test stat and critical value

How to solve $\lvert{x}\rvert - \lvert{2+x}\rvert = x$?

Expected value of ejecting balls from a jar

Functional equation: $R(1/x)/x^2 = R(x) $

nilradical of a quotient ring

Exciting games and material to motivate children to math

Is there any way to define arithmetical multiplication as other thing than repeated addition?

Two similar method to calculate one equation get different answer

Sum of a random number of non-identically distributed random variables

Why $(v+1)^{-2}$ is F distribution with (2,2) degree of freedom?

Accepting or rejecting $H_0$ for a different size of sample

Converse of the British Flag Theorem

Probability of an even number of sixes

Finding probability of a sample using Bayesian Inference

Let $R$ be a ring with $1_R$, $u = a + x $ is a unit and $x \in J(R)$, prove $a$ is a unit.