Mathematics Stack Exchange

0

votes

3

answers

11

views

Determine whether the series converge

sequences-and-series

8s ago arbautjc 656

0

votes

1

answer

16

views

To show limit of absolute (a_n+1)/(a_n) is smaller than lim inf absolute(a_n)^1/n

11s ago user70532 86

0

votes

0

answers

3

views

Hasse diagram without edge possible?

graph-theory

1m ago Andy 63

1

vote

1

answer

27

views

Post Correspondence Problem

number-theory computability

1m ago vonbrand 4,297

0

votes

0

answers

2

views

inner product space and injective -surjective

linear-algebra

1m ago jon 2

1

vote

2

answers

29

views

If $a_1,a_2,…,a_n $ be all positive real numbers,…

calculus real-analysis derivatives

2m ago user33640 920

0

votes

0

answers

5

views

Choosing a spinor space

clifford-algebras

3m ago Burakumin 21

1

vote

1

answer

12

views

Find the probability that equation has two solutions of different signs

homework probability inequality

3m ago Calvin Lin 6,347

0

votes

1

answer

19

views

Permutation for finding the smallest positive integer

discrete-mathematics permutations

3m ago user65422 84

0

votes

0

answers

15

views

'Easy' proof with sumsets

combinatorics number-theory

6m ago Charles 7,956

1

vote

0

answers

5

views

ideals in a Dedekind ring localized to a prime

abstract-algebra commutative-algebra ring-theory

7m ago Federica Maggioni 777

0

votes

1

answer

12

views

Question about the proof of the going-up theorem of Cohen-Seidenberg.

algebraic-geometry commutative-algebra

8m ago BenjaLim 15.7k

-2

votes

1

answer

22

views

dimension of the vector space

linear-algebra

9m ago somaye 184

0

votes

1

answer

23

views

How do I find the surface area of an angled conic base?

geometry algebraic-geometry trigonometry

9m ago pyRabbit 1

1

vote

0

answers

9

views

Taylor expansion with integral and convexity

calculus analysis functional-analysis integration taylor-expansion

9m ago halms 127

0

votes

1

answer

25

views

Burger's Equation 'Shocks' Not matching the characteristics

pde graphing-functions characteristic-functions

11m ago NightHallow 1

0

votes

1

answer

9

views

Optimizing an encounter rate in a population of interacting agents

optimization

11m ago Ross Millikan 76.3k

0

votes

0

answers

8

views

Cycle of length

discrete-mathematics permutations

13m ago user65422 84

1

vote

2

answers

17

views

Show that $\sum_{n=1}^{\infty} b_n$ is absolutely convergent

real-analysis sequences-and-series

13m ago André Nicolas 149k

1

vote

1

answer

15

views

Why is the coadjoint orbit passing through $X$ determined by the spectrum of $X$?

linear-algebra representation-theory lie-groups lie-algebras

15m ago Eric O. Korman 7,195

2

votes

0

answers

32

views

The Cantor Space as $\{0,1\}^{\mathbb{N}}$ and as $[0,1]$.

general-topology analysis logic fractals

15m ago Stefan 1,104

0

votes

1

answer

18

views

Clarification of the terminology: norm total

functional-analysis

15m ago Tom Cooney 927

1

vote

0

answers

22

views

Is this set dense in $H^1(\Omega)?$

general-topology functional-analysis banach-spaces sobolev-spaces normed-spaces

16m ago michael_faber 63

1

vote

1

answer

28

views

Harmonic mean: show $\max\{ax,by\} \ge \frac{1}{a+b}(x+y)$, $a,b>1$, $x,y\ge 0$

inequality

16m ago julien 17.9k

0

votes

0

answers

11

views

roots of $\tan z = a z $

complex-analysis

16m ago Mula Ko Saag 108

2

votes

1

answer

23

views

Real Pole Residue theorem

complex-analysis residue-calculus

18m ago Ron Gordon 18.6k

-1

votes

0

answers

16

views

Why is true this proposition?

homework commutative-algebra

20m ago rle3791 21

1

vote

1

answer

44

views

Group action on subsets

homework group-theory

21m ago Andreas Caranti 12.7k

1

vote

1

answer

70

views

Techniques to prove properties of a sequence

sequences-and-series number-theory divisibility

23m ago lechuza 284

0

votes

1

answer

38

views

Zernike and Legendre polynomials

special-functions orthogonal-polynomials

23m ago J. M. 38.2k

4

votes

3

answers

88

views

Very hard elementary Combinatorics distribution problem

combinatorics

25m ago achille hui 3,850

0

votes

0

answers

15

views

Equation of a 3d cone

geometry computer-science graphing-functions 3d

26m ago MvG 2,175

13

votes

1

answer

520

views

Did the Appel/Haken graph colouring (four colour map) proof really not contribute to understanding?

graph-theory math-history coloring

28m ago mloskot 103

1

vote

0

answers

25

views

Borel-Cantelli lemma proof $\text{P}\left(\lim_{n\to\infty}{ M_n\over{\log n}}=\frac{1}{\lambda}\right)=1$

homework real-analysis probability probability-theory

29m ago shilov 167

0

votes

0

answers

12

views

Taylor Series Expansion

probability

30m ago guestoiejroj 1

7

votes

1

answer

289

views

How can Radon-Nikodym and Borel-Cantelli be used to calculate Probability distribution?

probability-theory

30m ago Community♦ 1

2

votes

0

answers

12

views

Priority of the content of a note by Lebesgue from 1905

reference-request math-history

32m ago Asaf Karagila 82.2k

3

votes

1

answer

44

views

socles of semiperfect rings

ring-theory noncommutative-algebra

32m ago Manny Reyes 955

0

votes

0

answers

30

views

Have 3n + 1 Problem Proof --But can't do the Mathspeak

open-problem

33m ago iterated 1

1

vote

1

answer

16

views

Difference between true positive and true negative in this case

probability bayesian

33m ago André Nicolas 149k

0

votes

2

answers

239

views

Is there any difference between the definition of a commutative ring and field?

abstract-algebra ring-theory

36m ago BenjaLim 15.7k

3

votes

1

answer

21

views

Associated Primes of Tensor Product

abstract-algebra commutative-algebra

36m ago mbrown 230

2

votes

2

answers

28

views

Are WOT/SOT topologies hereditarily separable?

general-topology functional-analysis

37m ago yup 1

0

votes

1

answer

21

views

Bessel functions, zeros, and frequencies

mathematical-physics

37m ago Ron Gordon 18.6k

3

votes

1

answer

22

views

Compact sets of the complex plane with countable boundary

general-topology complex-numbers

38m ago Asaf Karagila 82.2k

1

vote

0

answers

13

views

Showing a set is a manifold

linear-algebra multivariable-calculus

40m ago MathPhys137 40

0

votes

0

answers

13

views

Morphism between Algebraic Varieties

algebraic-geometry

40m ago zacarias 723

3

votes

2

answers

45

views

If $G$ is abelian and if $N$ is a subgroup of $G$ prove that $G/N$ is abelian.

abstract-algebra group-theory

41m ago Babak S. 22.7k

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