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Top Questions
26
votes
A surprising conjecture about twin primes
nt.number-theory
prime-numbers
integer-sequences
asked Dec 22, 2016 at 11:49
mathoverflow.net
22
votes
Is the ring of holomorphic functions on $S^1$ Noetherian?
abstract-algebra
complex-analysis
ring-theory
noetherian
asked Jul 29, 2015 at 15:46
math.stackexchange.com
18
votes
Compute the limit $\lim\limits_{t \to + \infty} \int_0^{+ \infty} \frac{ \mathrm d x}{e^x+ \sin tx} $
calculus
integration
limits
definite-integrals
asked Sep 22, 2020 at 22:26
math.stackexchange.com
15
votes
Study of rings of the form $R+I$
abstract-algebra
algebraic-geometry
ring-theory
commutative-algebra
asked May 31, 2015 at 10:16
math.stackexchange.com
12
votes
On the theorem "$3$ is everywhere"
combinatorics
number-theory
asymptotics
recreational-mathematics
asked Mar 3, 2016 at 15:51
math.stackexchange.com
11
votes
On uniqueness of sums of prime powers
number-theory
prime-numbers
asked Jan 10, 2018 at 14:20
math.stackexchange.com
11
votes
Compute the value of the integral $\int_1^{\infty} \lfloor x^2 \rfloor e^{-x} \ \mathrm d x $
calculus
integration
sequences-and-series
definite-integrals
asked Aug 13, 2020 at 8:53
math.stackexchange.com
8
votes
When is a monoid contained in a group?
abstract-algebra
group-theory
category-theory
monoid
asked May 7, 2015 at 17:57
math.stackexchange.com
7
votes
On semisimple rings
abstract-algebra
modules
semi-simple-rings
asked Mar 30, 2015 at 9:59
math.stackexchange.com
5
votes
Number field attached to a finite group.
number-theory
representation-theory
asked May 4, 2015 at 14:31
math.stackexchange.com
1
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Top Answers
116
Inequality from Chapter 5 of the book *How to Think Like a Mathematician*
math.stackexchange.com
106
Unexpected examples of natural logarithm
math.stackexchange.com
55
Prime Number Rows in a Pascal's Triangle
math.stackexchange.com
43
How do people who study really abstract mathematics "imagine" or understand the concepts they are studying or being taught?
math.stackexchange.com
25
Do Cantor's Theorem and the Schroder-Bernstein Theorem Contradict?
math.stackexchange.com
22
Proving that $\sum\limits_{n=0}^{\infty }\frac{1}{(2n)!!}=\sqrt{e}$
math.stackexchange.com
20
Quotient ring being isomorphic to the initial ring
math.stackexchange.com
19
4 Color Theorem - What am I not seeing??
math.stackexchange.com
17
Product of inner products
math.stackexchange.com
17
Can this be considered a "rigorous" definition of a limit?
math.stackexchange.com
16
square-root of a transcendental number
math.stackexchange.com
16
Any subfield of $\mathbb{C}$ must contain every rational number
math.stackexchange.com
15
Prove that 2016 cannot be expressed as sum of prime and triangular number
math.stackexchange.com
15
Reversing the digits of an infinite decimal
math.stackexchange.com
14
Finding the sum of the series $\frac{1}{1!}+\frac{1+2}{2!}+\frac{1+2+3}{3!}+ \ldots$
math.stackexchange.com
13
Every element outside the maximal ideal of a local ring is a unit
math.stackexchange.com
13
Is the property of being a UFD preserved under quotients by prime ideals?
math.stackexchange.com
13
If $A$ is a square matrix such that $A^{27}=A^{64}=I$ then $A=I$
math.stackexchange.com
13
How to show (x, y) = (0, 0) is the only solution to $4x^2 + 3y^2 + \cos(2x^2 + y^2) = 1$
math.stackexchange.com
13
How can you find a Pythagorean triple with $a^2+b^2=c^2$ and $a/b$ close to $5/7$?
math.stackexchange.com
13
Convolution of a function with itself
math.stackexchange.com
13
Real square matrix as a sum of two invertible matrices
math.stackexchange.com
12
Is $\Bbb R/\Bbb Z$ isomorphic to $\Bbb R/2\Bbb Z$?
math.stackexchange.com
11
Meaning of the expression "orientation preserving" homeomorphism
math.stackexchange.com
11
If a finite set tiles the integers, must it be an arithmetic progression?
math.stackexchange.com
11
Operation that makes the negative real numbers, $\mathbb{R}_{<0}$, a group
math.stackexchange.com
11
Does every subgroup of finite index contain a power of each element of the group?
math.stackexchange.com
11
Why the limit can only be $0$
math.stackexchange.com
11
Show that $2n\choose n$ is divisible by $2n-1$
math.stackexchange.com
10
Limits using L'Hopital's rule $\lim_{x\to0^+} (x^{x^x-1})$
math.stackexchange.com
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