Huy
Reputation
3,066
Top tag
Next privilege 5,000 Rep.
Approve tag wiki edits
 Jan 2 comment Diagonalization versus s.d. product for non-commuting Hermitian matrices @nomadreid: Which bases do you mean? My point was that both statement (1) and (2) are equivalent to $[A,B] \neq 0$, in case it wasn't clear. I thought you were trying to understand how one comes up with these two results. Jan 2 revised double angle condition added 41 characters in body Jan 2 comment If A is an open set does A the complement of A have to be closed? I know the opossite is true by definition, is this? A set is closed if its complement is open. Jan 2 revised Does order of qualifiers matter in FOL formula? added 48 characters in body Jan 2 comment How does $\sum_{k=0}^n (pe^t)^k{n\choose k}(1-p)^{n-k} = (pe^t+1-p)^n$? en.wikipedia.org/wiki/Binomial_theorem#Statement_of_the_theorem Jan 2 revised Integral $\int_0^\infty \frac{\sqrt[3]{x+1} - \sqrt[3]{x}}{\sqrt{x}} \, \mathrm dx$ added 43 characters in body Jan 2 reviewed Approve A p-Sylow subgroup of a subgroup is a p-sylow subgroup of the group Jan 2 revised Poincaré inequality by capacity estimate. added 80 characters in body; edited title Jan 2 reviewed Approve Alice and Bob number sum game Jan 2 revised Construct an injective function that takes a function $\mathbb{N} \to \mathbb{R}$ and outputs an injective function $\mathbb{N} \to \mathbb{R}$ edited body Jan 2 answered Does order of qualifiers matter in FOL formula? Jan 2 revised Does order of qualifiers matter in FOL formula? added 126 characters in body Jan 2 reviewed Reviewed Find the cardinality of $\mathbb{F}_2$ adjoin a root of $X^4 + X + 1$ Jan 2 revised Find the cardinality of $\mathbb{F}_2$ adjoin a root of $X^4 + X + 1$ added 42 characters in body; edited tags Jan 1 reviewed Approve Use AM-GM to prove upper bound. Jan 1 comment Integrate $\int {1\over x^2(x-1)^3} \, dx$ @user1904218: You don't actually (explicitly) need substitution, you can use the chain rule which gives $((x-1)^{-1})' = -(x-1)^{-2}$ immediately. Jan 1 revised Integrate $\int {1\over x^2(x-1)^3} \, dx$ added 204 characters in body Jan 1 answered Integrate $\int {1\over x^2(x-1)^3} \, dx$ Jan 1 awarded Revival Jan 1 revised Understanding a “matrix representation” edited body