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Flounderer
  • Member for 13 years
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10 votes

Fun but serious mathematics books to gift advanced undergraduates.

10 votes

Jigsaw Puzzle Help

9 votes

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

8 votes
Accepted

Does "Big Data" Have a Ramsey Theory Problem?

5 votes
Accepted

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

5 votes

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

4 votes

Probability Riddle

4 votes
Accepted

How does the posterior of a dirac prior look like?

3 votes

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

3 votes

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

3 votes

Pullback, 2-form invariant

3 votes

Which Deck wins the most?

2 votes

Statistics Hypothesis Testing finding out test stat and critical value

2 votes

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

2 votes
Accepted

Expected value of ejecting balls from a jar

2 votes

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

2 votes

nilradical of a quotient ring

2 votes

Exciting games and material to motivate children to math

2 votes

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

1 vote

Two similar method to calculate one equation get different answer

1 vote

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

1 vote
Accepted

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

1 vote
Accepted

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

1 vote
Accepted

Converse of the British Flag Theorem

1 vote

Probability of an even number of sixes

0 votes
Accepted

Finding probability of a sample using Bayesian Inference

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.