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Jul
27
awarded  Yearling
Jul
17
revised Prove/disprove: if $X$ is an eigenvector of $T$ then X is a singular matrix
latex edit
Jul
17
suggested approved edit on Prove/disprove: if $X$ is an eigenvector of $T$ then X is a singular matrix
Jul
12
answered Find general location of point given conditions on its co-ordinates
Jul
10
awarded  Informed
Jul
9
comment In a field $F=\{0,1,x\}$, how does $1 + 1 = x$?
A simple way to see it. Nice.
Jul
8
answered How to prove $\det(I+uv^\intercal)=1+v^\intercal u$
Jul
8
answered Expected Value Proof - Law of Total Expectation.
Jun
14
comment Complex analytic functions $f \colon \mathbb C \to \mathbb C$ such that $|f|>1$ are constant
@Alfred $\frac{1}{f}$ is entire because its a composition of two entire functions: the constant function $1$ and the given $f(z)$. Like peter mentioned, if you define $g(z) = 1/f(z)$ then things become a little more clearer.
Jun
8
comment Infinite sum involving number of solutions to $k=i^2+j^2$
@r9m Thanks. This may be out of my scope, but what is the purpose of integration here?
Jun
8
comment Infinite sum involving number of solutions to $k=i^2+j^2$
Could you explain how the integration is coming into play here?
Jun
8
accepted The link between vectors spaces ($L^2(-\pi, \pi$) and fourier series
Jun
8
accepted Method of characteristics with constant PDE
Jun
8
accepted Solving a simple second order ODE with initial condition
Jun
8
accepted Finding coefficients of a double Fourier series
Jun
8
accepted What does the heat kernel in the heat equation represent $u(x,t)$?
Jun
8
accepted finding a basis for a simple graph
Jun
8
revised finding a basis for a simple graph
deleted 50 characters in body
Jun
8
accepted Showing there exists infinite $n$ such that $n! + 1$ is divisible by atleast two distinct primes
Jun
8
accepted using Dirichlet transforms to show infinity of primes