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12m ago
Are the quotient groups in a composition sequence necessarily subgroups?
— Martin Hofmann
311
2h ago
initial value problem: y'' + 4y = f(t) , y(0)= y'(0)=0. f(t) = { 0 if t <3; t if t >3}
— Gina Kousalis
112
3h ago
Constructive proof of a problem from the book Analysis by Terence Tao
— This is not my name
254
9h ago
Find $u\in\mathbb{R}$ such that $\mathbb{Q}(u) = \mathbb{Q}(2^{1/2}, 5^{1/3})$.
— geo.ramir3z
132
14h ago
Does $f(x)=x^{2}\sin(\frac{1}{x^{2}})$ satisfy the relation $f(x)+f(y)-2f(\frac{x+y}{2})=O(|x-y|^{2})$?
— Akmal
161
16h ago
Basic question - how to prove that any vector can be uniquely decomposed into parallel and orthogonal parts of any subspace?
— Tim
61
20h ago
How many points can you find on $y=x^2$, for $x \geq 0$, such that each pair of points has rational distance?
— Clark Zinzow
563
