Johannes Kloos
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 Sep13 revised What is a polynomially bounded function? Not particularly computer science-related, texified Sep2 reviewed Approve spectral-graph-theory tag wiki excerpt Aug2 reviewed Approve Finding the volume of $(x-4)^2+y^2 \leqslant 4$ Aug2 reviewed Reject Finitely generated ideal in Boolean ring; how do we motivate the generator? Jul6 comment Help with function proof Indeed, my bad. Ignore my previous comment. Jul6 comment Help with function proof @CameronWilliams: If you prefer, write $\mathbb{N}_0$. My natural numbers start at 0. Jul6 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). Jul6 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. May31 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... May25 comment Proof that whether some arbitrary Turing machine on some input outputs $5$ is undecidable Your proof is entirely correct. Apr26 reviewed Reject Uniform convergence of $\sum_{k=1}^\infty \frac{1}{k^{1+x}}$ Apr21 reviewed Approve Estimating the integrated Tchebychev function and calculating its error Apr20 reviewed Approve Find last n for which 2^n has a 0. Apr11 reviewed Edit If $2$ divides a number $a$, does $2^n$ divide $a$ ? $n$ is any integar Apr11 revised If $2$ divides a number $a$, does $2^n$ divide $a$ ? $n$ is any integar improved formatting and some grammar fixes Apr6 reviewed Approve Confidence interval for n=1, unknown standard deviation Apr2 reviewed Edit How can a piece of A4 paper be folded in exactly three equal parts? Apr2 revised How can a piece of A4 paper be folded in exactly three equal parts? Added photo explanation. Mar31 reviewed Approve What is a hypersurface ring and why is it Gorenstein? Mar30 reviewed Approve Geometric reducedness (integral) versus reducedness (integral)