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Favorite Question

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An example of a derivation at a point on a $C^k$-manifold which is not a tangent vector

Awarded 4 hours ago

Aleksei Averchenko

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Product of all monic irreducibles with degree dividing $n$ in $\mathbb{F}_{q}$?

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Hailie

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weak convergence in $L^p$ plus convergence of norm implies strong convergence

Awarded 2 days ago

chango

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Does the Levi-Civita connection determine the metric?

Awarded Jul 15 at 14:24

archipelago

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Examples where it is easier to prove more than less

Awarded Jul 13 at 0:20

M Carl

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Find all connected covering space of $\mathbb RP^2\vee \mathbb RP^2$

Awarded Jul 12 at 0:27

Andrews

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Determinant of the Kronecker Product of Two Matrices

Awarded Jul 9 at 6:03

Jonas Gomes

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Moment generating functions/ Characteristic functions of $X,Y$ factor implies $X,Y$ independent.

Awarded Jul 5 at 20:10

nullUser

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Does taking the direct limit of chain complexes commute with taking homology?

Awarded Jul 3 at 13:35

Dan Rust

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Why consider square-integrable functions?

Awarded Jul 1 at 22:06

isomorphismes

4,6022 gold badges44 silver badges52 bronze badges

Proving that the dual of the $\mathcal{l}_p$ norm is the $\mathcal{l}_q$ norm.

Awarded Jul 1 at 2:08

mark leeds

1,5542 gold badges15 silver badges21 bronze badges

Galois group of a biquadratic quartic

Awarded Jun 30 at 6:58

Lotus

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Prove: $\binom{n}{k}^{-1}=(n+1)\int_{0}^{1}x^{k}(1-x)^{n-k}dx$ for $0 \leq k \leq n$

Awarded Jun 29 at 16:10

Jozef

7,1104 gold badges53 silver badges89 bronze badges

Failure of isomorphisms on stalks to arise from an isomorphism of sheaves

Awarded Jun 28 at 19:32

Zev Chonoles

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Zorn's Lemma And Axiom of Choice

Awarded Jun 27 at 18:41

Abcd J

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What's the best way to measure mathematical ability?

Awarded Jun 26 at 13:20

Korgan Rivera

4,1989 gold badges45 silver badges61 bronze badges

How can I find a mod with negative number? [duplicate]

Awarded Jun 24 at 18:31

user963241

6792 gold badges10 silver badges19 bronze badges

Solving linear congruences by hand: modular fractions and inverses

Awarded Jun 24 at 16:55

Old John

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An entire function whose real part is bounded above must be constant.

Awarded Jun 22 at 12:40

Camilo Arosemena-Serrato

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The Typewriter Sequence

Awarded Jun 22 at 11:49

Fabian

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How do I integrate the following? $\int{\frac{(1+x^{2})\mathrm dx}{(1-x^{2})\sqrt{1+x^{4}}}}$

Awarded Jun 20 at 15:16

LinAlgStudent

2,0697 gold badges25 silver badges29 bronze badges

What is the correct way to self learn from a textbook?

Awarded Jun 19 at 19:04

Movers

4325 silver badges11 bronze badges

Self teaching Galois Theory

Awarded Jun 18 at 22:46

Kaish

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Tensor products of functions generate dense subspace?

Awarded Jun 18 at 7:34

Syang Chen

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Sheaves and complex analysis

Awarded Jun 16 at 22:30

vgty6h7uij

9589 silver badges16 bronze badges

How to choose correct strategy for irreducibility testing in $\mathbb{Z}[X]$?

Awarded Jun 16 at 13:10

Dave Gaebler

2,7971 gold badge23 silver badges23 bronze badges

Splitting of conjugacy class in alternating group

Awarded Jun 13 at 14:10

user24273

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The Modulus of all the roots of a Polynomial are equal to $1$

Awarded Jun 11 at 19:15

math110

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Concrete FFT polynomial multiplication example

Awarded Jun 9 at 9:56

alh

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Gaussian-like integral : $\int_0^{\infty} e^{-x^2} \cos( a x) \ \mathrm{d}x$

Awarded Jun 7 at 12:52

Tulip

4,9284 gold badges26 silver badges40 bronze badges

Prove that 1+1=2 [duplicate]

Awarded Jun 5 at 21:36

Gere

2,1372 gold badges17 silver badges24 bronze badges

Show that a continuous function has a fixed point

Awarded Jun 5 at 15:04

ghshtalt

2,7939 gold badges37 silver badges41 bronze badges

Absolutely continuous functions

Awarded Jun 4 at 14:16

Vishesh

2,9481 gold badge23 silver badges39 bronze badges

Prove that if $\sum{a_n}$ converges absolutely, then $\sum{a_n^2}$ converges absolutely

Awarded Jun 4 at 6:12

Richard Sullivan

6861 gold badge7 silver badges14 bronze badges

What are the best books to study Neural Networks from a purely mathematical perspective?

Awarded Jun 3 at 18:27

Ile

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A very odd resolution to an integral equation

Awarded Jun 2 at 20:16

Alma Arjuna

3,88111 silver badges41 bronze badges

How are topological invariants obtained from TQFTs used in practice?

Awarded Jun 1 at 7:42

Melissa

6215 silver badges6 bronze badges

Set, n-Tuple, Vector and Matrix — links and differences

Awarded May 30 at 22:56

Syd Amerikaner

4391 gold badge5 silver badges20 bronze badges

Is First Order Logic (FOL) the only fundamental logic?

Awarded May 30 at 17:31

Mono

6005 silver badges9 bronze badges

Understanding the definition of tensors as multilinear maps

Awarded May 28 at 3:12

Antoni Parellada

9,0815 gold badges48 silver badges141 bronze badges

Can a complex number ever be considered 'bigger' or 'smaller' than a real number, or vice versa?

Awarded May 20 at 15:04

Juanma Eloy

1,4351 gold badge14 silver badges19 bronze badges

Why are we justified in using the real numbers to do geometry?

Awarded May 17 at 13:15

Olivier

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Finding the number of elements of particular order in the symmetric group

Awarded May 16 at 18:57

Akash Patalwanshi

3,2882 gold badges25 silver badges59 bronze badges

What is the best way to calculate log without a calculator?

Awarded May 16 at 3:04

Ogen

2,2858 gold badges33 silver badges44 bronze badges

Understanding the singular value decomposition (SVD)

Awarded May 15 at 13:48

Celdor

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The preimage of continuous function on a closed set is closed.

Awarded May 15 at 13:48

1LiterTears

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Cauchy-Riemann equations in polar form. [duplicate]

Awarded May 15 at 12:31

EmaLee

1,1733 gold badges17 silver badges29 bronze badges

Find the square root of a matrix

Awarded May 13 at 6:47

BVFanZ

8591 gold badge10 silver badges11 bronze badges

Why gradient vector is perpendicular to the plane

Awarded May 10 at 20:27

Sida

6911 gold badge8 silver badges13 bronze badges

The characteristic and minimal polynomial of a companion matrix

Awarded May 10 at 12:11

DBr

4,8303 gold badges31 silver badges42 bronze badges

Proof that Pi is constant (the same for all circles), without using limits

Awarded May 3 at 18:34

Chris Card

2,0481 gold badge17 silver badges16 bronze badges

Appropriate Notation: $\equiv$ versus $:=$

Awarded May 3 at 7:26

Moderat

4,4678 gold badges44 silver badges61 bronze badges

Help me put these enormous numbers in order: googol, googol-plex-bang, googol-stack and so on

Awarded May 2 at 14:40

JDH

44.4k14 gold badges125 silver badges190 bronze badges

Why do proof authors use natural language sentences to write proofs?

Awarded Apr 28 at 4:17

Hal

3,4263 gold badges28 silver badges40 bronze badges

Proving that $\int_0^1 \frac{\log \left(\frac{1}{t}\right) \log (t+2)}{t+1} \, dt=\frac{13}{24} \zeta (3)$

Awarded Apr 26 at 18:47

user 1591719

44.4k12 gold badges110 silver badges257 bronze badges

Existence of a local geodesic frame

Awarded Apr 23 at 13:51

Ehsan M. Kermani

9,3163 gold badges39 silver badges55 bronze badges

Probability that a quadratic polynomial with random coefficients has real roots

Awarded Apr 22 at 5:51

Pedro d'Aquino

4951 gold badge5 silver badges6 bronze badges

Proof Verification - Every sequence in $\Bbb R$ contains a monotone sub-sequence

Awarded Apr 20 at 21:26

Ishfaaq

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Easiest and most complex proof of $\gcd (a,b) \times \operatorname{lcm} (a,b) =ab.$

Awarded Apr 18 at 6:56

Sebastian Valencia

1,6401 gold badge18 silver badges32 bronze badges

Calculate the expected value of $Y=e^X$ where $X \sim N(\mu, \sigma^2)$

Awarded Apr 15 at 19:42

Jim Raynor

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