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 Yearling
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1d
reviewed Approve Why Lagrange multipliers don't help to find the minimum of $f(x,y)=x^2+y^2$ with the constraint $y=1$?
Aug
22
reviewed Approve cryptography tag wiki excerpt
Aug
22
reviewed Approve Differential Equation Solution Incorrect
Aug
17
reviewed Approve Confusion with laws of logic?
Aug
17
reviewed Approve Let $H(x)$ denote Heaviside's function. Define $F(x) := \int^x_0 H(t) \ dt$. Is $F$ continuous, differentiable? Result contrary to FTC?
Aug
16
reviewed Approve What does a duplicate-triplicate-etc ratio mean?
Aug
14
reviewed Approve Lebesgue outer measure of disjoint sets in $\mathbb{R}^n$
Aug
14
reviewed Approve Entering math through the side door
Aug
9
reviewed Approve Find a harmonic function in the interior of the disk, taking values +1 and -1
Aug
6
reviewed Approve Derivative of $e^{\sin(\ln[2 \arctan(2x)])}$
Aug
4
awarded  Yearling
Aug
3
reviewed Reject Basic examples topological manifolds with boundary
Aug
3
reviewed Approve Prove that the multiplicative inverse of $a$ modulo $m$ exists if and only if $a$ and $m$ are coprime.
Aug
2
reviewed Approve solve this linear equation
Aug
1
reviewed Approve Possible values of a $f(x)=(ab-b^2-2)x+\int_{0}^{x} x^2(\cos^{4}t+\sin^{4}t)\mathrm{d}t$
Jul
28
reviewed Approve Choose a random number between 0 and 1 and record its value. Keep doing it until the sum of the numbers exceeds 1. How many tries do we have to do?
Jul
28
reviewed Approve Sign of eigenvalues of $A$ by $\det(A-\lambda I)=\lambda \det(B+D-\lambda I).$
Jul
28
answered Constructing a HoTT proof term of 1≠0
Jul
26
reviewed Approve limit of a region of integration in $\mathbb{R}^2$ approaches a line
Jul
26
reviewed Approve Why is $1^{\infty}$ considered to be an indeterminate form