Favorite Question - Badge - Mathematics Stack Exchange

Favorite Question

Question saved by 25 users. This badge can be awarded multiple times.

Awarded 3292 times.

A vector space is an abelian group with some extra structure?

Awarded May 11 at 18:46

Bob

8371 gold badge9 silver badges20 bronze badges

Extending the result $\int_{0}^{\infty} \left( ( 1 - 2C(x))^{2} + (1-2S(x))^{2} \right) \, dx = \frac{4}{\pi} $

Awarded May 9 at 13:58

Sangchul Lee

186k17 gold badges302 silver badges500 bronze badges

Find $\lim_{n \to \infty}\frac{x_n}{\sqrt{n}}$ where $x_{n+1}=x_n+\frac{n}{x_1+x_2+\cdots+x_n}$

Awarded May 9 at 1:21

WuKong

14.4k1 gold badge18 silver badges45 bronze badges

Quotient ring of Gaussian integers $\mathbb{Z}[i]/(a+bi)$ when $a$ and $b$ are NOT coprime

Awarded May 6 at 16:05

Watson

24.5k12 gold badges52 silver badges133 bronze badges

When $f(x+1)-f(x)=f'(x)$, what are the solutions for $f(x)$?

Awarded May 4 at 9:06

user72273

8757 silver badges11 bronze badges

Equation of a "tilted" sine

Awarded May 2 at 14:23

Lugi

1,3491 gold badge10 silver badges14 bronze badges

Showing that Brownian motion is bounded with non-zero probability

Awarded Apr 26 at 13:45

yaakov

9558 silver badges9 bronze badges

Relation between differentiable,continuous and integrable functions.

Awarded Apr 25 at 10:07

under root

9371 gold badge14 silver badges24 bronze badges

Do finite algebraically closed fields exist?

Awarded Apr 22 at 21:40

Aspirin

5,9096 gold badges35 silver badges57 bronze badges

Interpreting Line Integrals with respect to $x$ or $y$

Awarded Apr 22 at 15:21

Jim_CS

5,47124 gold badges67 silver badges85 bronze badges

What is category theory?

Awarded Apr 19 at 17:27

Number 9

1,5271 gold badge15 silver badges23 bronze badges

Intuition about the second isomorphism theorem

Awarded Apr 15 at 17:19

Gold

28.4k21 gold badges115 silver badges214 bronze badges

What is a short exact sequence telling me?

Awarded Apr 15 at 17:07

Ziofil

1,6701 gold badge13 silver badges18 bronze badges

Prove ${\large\int}_0^\infty\frac{\ln x}{\sqrt{x}\ \sqrt{x+1}\ \sqrt{2x+1}}dx\stackrel?=\frac{\pi^{3/2}\,\ln2}{2^{3/2}\Gamma^2\left(\tfrac34\right)}$

Awarded Apr 11 at 21:46

Vladimir Reshetnikov

32.8k11 gold badges180 silver badges324 bronze badges

Intuition behind Sobolev Inequality

Awarded Apr 7 at 17:51

Cesare Kalb.

2,04516 silver badges30 bronze badges

Intuition behind variation of parameters method for solving differential equations

Awarded Apr 5 at 8:21

Perpetual learner

6497 silver badges16 bronze badges

Can I think of Algebra like this?

Awarded Apr 2 at 20:29

Nico A

5,1344 gold badges29 silver badges50 bronze badges

What resources are there for learning Russian math terminology?

Awarded Apr 2 at 6:17

Jack Henahan

7787 silver badges13 bronze badges

Reference for spectral sequences

Awarded Mar 30 at 13:31

Rasmus

19k3 gold badges74 silver badges104 bronze badges

Does every Cauchy sequence converge to *something*, just possibly in a different space?

Awarded Mar 28 at 8:38

1Teaches2Learn

2,58912 silver badges15 bronze badges

Set theory: difference between belong/contained and includes/subset?

Awarded Mar 24 at 9:41

Philip P.

5531 gold badge5 silver badges4 bronze badges

What is a local parameter in algebraic geometry?

Awarded Mar 17 at 12:34

Zach Conn

5,2831 gold badge28 silver badges30 bronze badges

Useful examples of pathological functions

Awarded Mar 14 at 15:05

Isaac

37.1k15 gold badges112 silver badges142 bronze badges

Properties and notation of third-order (and higher) partial-derivatives

Awarded Mar 13 at 12:10

SDV

7401 gold badge6 silver badges12 bronze badges

Does equality of characteristic polynomials guarantee equivalence of matrices?

Awarded Mar 10 at 15:36

jzadeh

3,1831 gold badge30 silver badges47 bronze badges

Two definitions of Lebesgue integration

Awarded Mar 9 at 19:52

Doubting Thomas

7756 silver badges12 bronze badges

How to prove $(AB)^T=B^T A^T$

Awarded Mar 9 at 10:34

Jeff

3,4956 gold badges34 silver badges44 bronze badges

What is an algebraic variety?

Awarded Mar 7 at 8:40

Nico

1,65315 silver badges24 bronze badges

Is "A New Kind of Science" a new kind of science?

Awarded Mar 7 at 5:12

Andrea

2,50316 silver badges28 bronze badges

Crazy $\int_0^\infty{_3F_2}\left(\begin{array}c\tfrac58,\tfrac58,\tfrac98\\\tfrac12,\tfrac{13}8\end{array}\middle|\ {-x}\right)^2\frac{dx}{\sqrt x}$ [closed]

Awarded Mar 6 at 2:47

Zakharia Stanley

Limit of ${a_n}^{1/n}$ is equal to $\lim_{n\to\infty} a_{n+1}/a_n$

Awarded Mar 1 at 18:55

hmmmm

5,8435 gold badges50 silver badges84 bronze badges

How do I interpret Euler's formula? [duplicate]

Awarded Feb 27 at 8:51

user525966

5,9855 gold badges45 silver badges80 bronze badges

How to prove that a $3 \times 3$ Magic Square must have $5$ in its middle cell?

Awarded Feb 26 at 21:40

Archisman Panigrahi

2,7162 gold badges22 silver badges33 bronze badges

How to start a math blog?

Awarded Feb 26 at 0:49

Evan Aad

12k2 gold badges45 silver badges94 bronze badges

Prove that the closure of complement, is the complement of the interior

Awarded Feb 24 at 13:30

Jeybe

1,2821 gold badge12 silver badges18 bronze badges

Are Taylor series and power series the same "thing"?

Awarded Feb 23 at 6:31

pshmath0

11.3k6 gold badges50 silver badges94 bronze badges

Why is cross product defined in the way that it is?

Awarded Feb 20 at 21:53

koe

7871 gold badge8 silver badges11 bronze badges

What does it mean to be an $L^1$ function?

Awarded Feb 20 at 15:13

fourier1234

1,6671 gold badge15 silver badges28 bronze badges

Showing the set of zero-divisors is a union of prime ideals

Awarded Feb 18 at 8:14

yunone

23k10 gold badges85 silver badges161 bronze badges

Proof that the dimension of a matrix row space is equal to the dimension of its column space

Awarded Feb 16 at 23:42

The Pointer

4,78621 gold badges107 silver badges225 bronze badges

How does one graduate from Hecke Operators to Hecke Correspondences?

Awarded Feb 15 at 17:17

Jenifer

4814 silver badges6 bronze badges

Geometric explanation of $\sqrt 2 + \sqrt 3 \approx \pi$

Awarded Feb 14 at 14:41

ahala

3,1702 gold badges26 silver badges37 bronze badges

Total ordering on complex numbers

Awarded Feb 13 at 0:43

Mika H.

5,9177 gold badges39 silver badges78 bronze badges

Triangle inequality for subtraction? [duplicate]

Awarded Feb 10 at 21:40

CodeKingPlusPlus

7,59817 gold badges72 silver badges106 bronze badges

Dantzig's unsolved homework problems

Awarded Feb 7 at 3:38

Max

1,1072 gold badges9 silver badges12 bronze badges

Book recommendation : Olympiad Combinatorics book

Awarded Feb 1 at 14:18

Sunaina Pati

4,2652 gold badges13 silver badges37 bronze badges

Why are de Rham cohomology and Cech cohomology of the constant sheaf the same

Awarded Jan 25 at 23:05

Joe Tait

3,1192 gold badges22 silver badges29 bronze badges

How do you find the Lie algebra of a Lie group (in practice)?

Awarded Jan 25 at 16:56

Zeophlite

6811 gold badge7 silver badges13 bronze badges

Nice way of thinking about the Laplace operator... but what's the proof?

Awarded Jan 25 at 16:56

PolyKnowMeAll

9489 silver badges15 bronze badges

Relationship between Galois cohomology and etale cohomology.

Awarded Jan 25 at 2:52

Albert007

4074 silver badges9 bronze badges

How to compute the determinant of a tridiagonal Toeplitz matrix?

Awarded Jan 21 at 18:11

user46450

4311 gold badge6 silver badges7 bronze badges

Understanding weighted inner product and weighted norms

Awarded Jan 13 at 2:27

Srijan

13.1k10 gold badges76 silver badges120 bronze badges

Sum of Square roots formula.

Awarded Jan 11 at 10:06

lk42392

4871 gold badge7 silver badges14 bronze badges

How to show a representation is irreducible?

Awarded Jan 9 at 7:12

TheMobiusLoops

1,3771 gold badge19 silver badges35 bronze badges

basic difference between canonical isomorphism and isomorphims

Awarded Jan 9 at 2:19

MAS

10.9k7 gold badges39 silver badges106 bronze badges

Simplifying $\sqrt[4]{161-72 \sqrt{5}}$

Awarded Jan 6 at 8:53

1110101001

4,3262 gold badges40 silver badges80 bronze badges

Showing group with $p^2$ elements is Abelian

Awarded Jan 6 at 2:41

Jimmy Valmer

3231 gold badge4 silver badges4 bronze badges

How a principal bundle and the associated vector bundle determine each other

Awarded Jan 5 at 14:37

GFR

5,64123 silver badges38 bronze badges

'Trace trick' for expectations of quadratic forms

Awarded Jan 1 at 16:51

tomka

9681 gold badge12 silver badges24 bronze badges

Motivation for abstract harmonic analysis

Awarded Dec 28, 2024 at 4:18

Hui Yu

15.6k7 gold badges47 silver badges117 bronze badges

Prev 1

3 4 5

…

55 Next