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Top Questions
11
votes
Direct products, direct sums and coproducts in category of groups
abstract-algebra
category-theory
asked Apr 1, 2015 at 10:52
math.stackexchange.com
10
votes
Is projection of a closed set $F\subseteq X\times Y$ always closed?
general-topology
examples-counterexamples
product-space
closed-map
asked Jun 16, 2013 at 21:14
math.stackexchange.com
9
votes
Proving $x^4+y^4=z^2$ has no integer solutions
number-theory
algebraic-geometry
elliptic-curves
asked Jan 7, 2017 at 16:43
math.stackexchange.com
8
votes
Given three integers in $\{0,\ldots,100\}$ which sum up to $100$. What is the probabilty that two of them are the same?
probability
combinatorics
elementary-number-theory
discrete-mathematics
solution-verification
asked Aug 9, 2013 at 11:27
math.stackexchange.com
8
votes
Does it make sense for me, as a beginner, to buy a speedlight?
equipment-recommendation
flash
lighting
hotshoe-flash
bounce-flash
asked Jul 9, 2021 at 12:23
photo.stackexchange.com
6
votes
Prove for each $A\subset \mathbb{R}$ there exists Borel set whose measure is same as outer measure of $A$
measure-theory
lebesgue-measure
asked Dec 18, 2013 at 15:22
math.stackexchange.com
6
votes
Proving right angle using vectors
linear-algebra
geometry
vectors
euclidean-geometry
analytic-geometry
asked Oct 9, 2018 at 19:17
math.stackexchange.com
6
votes
Prove that $2^{10}+5^{12}$ is composite
elementary-number-theory
prime-numbers
asked Oct 17, 2014 at 13:32
math.stackexchange.com
5
votes
Is uncountable subset of separable space separable?
general-topology
asked May 14, 2013 at 8:20
math.stackexchange.com
5
votes
Easier way to solve $\int\frac{2+\sin x}{\sin x(1+\cos x)}dx$
integration
asked Jul 31, 2014 at 22:08
math.stackexchange.com
Top Answers
No answers with score of 5 or more
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