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awarded  Great Question
Jul
14
reviewed No Action Needed Weighted Jaccard Index
Jul
10
comment Is it known whether there are ever infinitely many primes of the form $\prod_i p_i^{n_i} + 1$ where the $p_i$ are fixed primes but the $n_i$ can vary?
math.stackexchange.com/questions/945311/…
Jul
10
reviewed Approve Diagonalizing a matrix. Is it necessary to use $P^{-1}AP=D$?
Jul
9
comment Is it known whether there are ever infinitely many primes of the form $\prod_i p_i^{n_i} + 1$ where the $p_i$ are fixed primes but the $n_i$ can vary?
The next refinement would be what is the best $f$ we can use in the statement that there are an infinite number of primes $q$ of the form $q = 1 + \prod_i p_i ^ {n_i}$ with all $p_i \le f(q)$. This question asks if $f(q) = c$, and $f(q) = q + 1$ works.
Jul
9
accepted Infinite number of primes of the form $2^x \cdot 3^y + 1$?
Jul
9
comment Infinite number of primes of the form $2^x \cdot 3^y + 1$?
Seems to be an open problem en.wikipedia.org/wiki/Pierpont_prime
Jul
9
asked Infinite number of primes of the form $2^x \cdot 3^y + 1$?
Jul
9
revised Evaluating function
added 68 characters in body
Jul
9
answered Evaluating function
Jun
11
awarded  Necromancer
Jun
4
awarded  Proofreader
Jun
4
reviewed Reject How to read category diagrams?
Jun
4
reviewed Approve Show that the set with the following operation and group product is a group. Allan Clark Elements of Abstract Algebra question 28(delta)
Jun
4
reviewed Approve Is this task defined mathematically correctly?
Jun
3
reviewed Leave Closed binomial expression of a powered term
Jun
3
reviewed Leave Closed The goal of solving a Heat/Wave Equation
Jun
3
reviewed Reject Prove that the sequence is a weakly convergent sequence
May
25
reviewed Approve Let S be the set of stars in our galaxy. There is same number subsets as functions f : S --> {a,b}?
May
21
reviewed Looks OK How can we show that $S^0$ is a manifold?