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Sep
13
revised What is a polynomially bounded function?
Not particularly computer science-related, texified
Sep
2
reviewed Approve spectral-graph-theory tag wiki excerpt
Aug
2
reviewed Approve Finding the volume of $(x-4)^2+y^2 \leqslant 4$
Aug
2
reviewed Reject Finitely generated ideal in Boolean ring; how do we motivate the generator?
Jul
6
comment Help with function proof
Indeed, my bad. Ignore my previous comment.
Jul
6
comment Help with function proof
@CameronWilliams: If you prefer, write $\mathbb{N}_0$. My natural numbers start at 0.
Jul
6
comment Help with function proof
To everybody trying to show a proof: Please make sure that what you want to prove is actually correct. In particular, consider $A = B = \mathbb{N}$, $f(x) = 0$, $Y = 2\mathbb{N}$ (the set of even numbers).
Jul
6
comment Who named “Quotient groups”?
Skimming the paper, Hölder uses the term "Faktorgruppe" (factor group), and refers to an expression "factor of composition" that he attributes to Jordan.
May
31
comment How to extend an existing orthogonal set of vectors?
Would guessing a linearly independent vector and then taking the orthogonal part work? You can make a vector orthogonal to a given set of vectors using methods similar to Gram-Schmidt...
May
25
comment Proof that whether some arbitrary Turing machine on some input outputs $5$ is undecidable
Your proof is entirely correct.
Apr
26
reviewed Reject Uniform convergence of $\sum_{k=1}^\infty \frac{1}{k^{1+x}}$
Apr
21
reviewed Approve Estimating the integrated Tchebychev function and calculating its error
Apr
20
reviewed Approve Find last n for which 2^n has a 0.
Apr
11
reviewed Edit If $2$ divides a number $a$, does $2^n$ divide $a$ ? $n$ is any integar
Apr
11
revised If $2$ divides a number $a$, does $2^n$ divide $a$ ? $n$ is any integar
improved formatting and some grammar fixes
Apr
6
reviewed Approve Confidence interval for n=1, unknown standard deviation
Apr
2
reviewed Edit How can a piece of A4 paper be folded in exactly three equal parts?
Apr
2
revised How can a piece of A4 paper be folded in exactly three equal parts?
Added photo explanation.
Mar
31
reviewed Approve What is a hypersurface ring and why is it Gorenstein?
Mar
30
reviewed Approve Geometric reducedness (integral) versus reducedness (integral)