Mathematics

71%

+3 −0

What is an example of a pathological imbedding of a(n allowed) graph into an oriented surface?

0 answers · posted 1mo ago by The Amplitwist‭ · edited 1mo ago by The Amplitwist‭

topology graph-theory

28%

+0 −3

How do I compare lotteries' chances of winning jackpot, when they differ in the maximum number of plays?

1 answer · posted 1y ago by Chgg Clou‭ · edited 1y ago by Chgg Clou‭

lottery

66%

+2 −0

The Fourier transform of $1/p^3$

1 answer · posted 2mo ago by C-T‭ · last activity 2mo ago by LL 3.14‭

complex-analysis calculus multivariable-calculus integration fourier-analysis

28%

+0 −3

What is a dual object? [closed]

0 answers · posted 2mo ago by Julius H.‭ · closed 2mo ago by Peter Taylor‭

category-theory

33%

+1 −4

25% probability that there was a chance of avoiding injury $\quad$ vs. $\quad$ 25% chance of avoiding injury

2 answers · posted 12mo ago by DNB‭ · last activity 7mo ago by Agent Smith‭

probability

22%

+0 −5

Isn't Ontario 49 always worse than Daily Grand? [closed]

0 answers · posted 1y ago by Chgg Clou‭ · closed 1y ago by Peter Taylor‭

lottery

60%

+1 −0

Dividing a cuboid in four

1 answer · posted 1y ago by Yair Rand‭ · last activity 1y ago by Peter Taylor‭

geometry

66%

+2 −0

The derivatives of a function at a boundary point

1 answer · posted 3mo ago by tommi‭ · last activity 3mo ago by Snoopy‭

derivatives real-analysis

30%

+1 −5

What did James Stewart mean by "the line integral reduces to an ordinary single integral in this case" ?

2 answers · posted 1y ago by TextKit‭ · edited 1y ago by trichoplax‭

line-integral

62%

+3 −1

Minimal non-standard number in non-standard models of PA

1 answer · posted 2mo ago by Aditya‭ · edited 2mo ago by The Amplitwist‭

logic model peano-arithmetic nonstandard-models

66%

+2 −0

$\sup(A\cdot B) = (\sup A)(\sup B)$ where $A$ and $B$ bounded sets of positive real numbers

3 answers · posted 4mo ago by Snoopy‭ · edited 4mo ago by Snoopy‭

real-analysis supremum-infimum

80%

+6 −0

Criteria for solvable Minesweeper game?

0 answers · posted 10mo ago by Olin Lathrop‭ · edited 10mo ago by Olin Lathrop‭

algorithm

66%

+2 −0

Using convexity in the proof of Hölder’s inequality

1 answer · posted 3mo ago by Snoopy‭ · last activity 20d ago by Snoopy‭

real-analysis

42%

+1 −2

Picture proof for expansion of $x^n−y^n$

2 answers · posted 8mo ago by Este‭ · last activity 8mo ago by Peter Taylor‭

visualization

33%

+1 −4

Without trial and error, how can I effortlessly deduce all $n, k_i ∈ ℕ ∋ \binom n {k_1, k_2, ..., k_n} =$ given c?

1 answer · posted 8mo ago by Chgg Clou‭ · edited 8mo ago by Chgg Clou‭

combinatorics

22%

+0 −5

At what jackpot minimum is playing Lottario rational?

1 answer · posted 1y ago by Chgg Clou‭ · edited 1y ago by Chgg Clou‭

lottery

60%

+1 −0

Is there a two variable quartic polynomial with two strict local minima and no other critical point?

0 answers · posted 1y ago by Pavel Kocourek‭

multivariable-calculus real-analysis maxima-minima polynomials roots

33%

+1 −4

How to decide whether to buy a lottery with a too negative EV, but passable $\Pr($you win jackpot at least once│n plays)? [closed]

0 answers · posted 9mo ago by Chgg Clou‭ · edited 9mo ago by Chgg Clou‭

lottery

71%

+3 −0

organizing a library

1 answer · posted 1y ago by msh210‭ · last activity 1y ago by celtschk‭

combinatorics recreational-mathematics

60%

+1 −0

Connection between caustics and conjugate points?

0 answers · posted 1y ago by tommi‭

differential-geometry

42%

+1 −2

1 picture proof for the triangle inequality and the reverse triangle inequality

0 answers · posted 8mo ago by Este‭ · edited 8mo ago by trichoplax‭

visualization

71%

+3 −0

Criterion in terms of the bases for determining whether one topology is finer than another

1 answer · posted 1y ago by Snoopy‭ · last activity 1y ago by celtschk‭

topology

66%

+2 −0

The purpose of logical frameworks in specifying type theories

1 answer · posted 1y ago by user205‭ · last activity 1y ago by Derek Elkins‭

type-theory logic

66%

+2 −0

Is the nth Betti number determined by orientability?

1 answer · posted 6mo ago by WheatWizard‭ · edited 5mo ago by WheatWizard‭

betti-numbers algebraic-topology

75%

+4 −0

What is the probability that the convex hull of $n$ randomly distributed points has $l$ of the points on its boundary?

1 answer · posted 1y ago by siric‭ · edited 1y ago by tommi‭

probability convex-hull

70%

+5 −1

What is the formula for sample standard deviation of a small sample size?

2 answers · posted 8mo ago by Ivan Nepomnyashchikh‭ · last activity 7mo ago by Agent Smith‭

statistics

71%

+3 −0

Show that $f(x) = \arctan\left(\frac{x}{x+1}\right) + \arctan\left(\frac{x+1}{x}\right) = \frac{\pi}{2}$

2 answers · posted 1y ago by Carefree Explorer‭ · last activity 1y ago by Derek Elkins‭

limits trigonometry

75%

+4 −0

If $\mathbf{R}$ is thought of as a vector space over $\mathbf{Q}$, what is its dimension?

1 answer · posted 1y ago by Snoopy‭ · last activity 1y ago by r~~‭

linear-algebra vector-space

22%

+0 −5

If a changes to b, then doesn't a + d = b? Why a(1 + d) = b? [closed]

0 answers · posted 1y ago by Chgg Clou‭ · closed 1y ago by Peter Taylor‭

high-school-mathematics

55%

+3 −2

Intuitively, why doesn't picking unpopular integers ($> 31$) lower your probability of winning lotteries?

1 answer · posted 9mo ago by Ethen‭ · last activity 9mo ago by Derek Elkins‭

lottery

28%

+0 −3

Expanding the Integration problem.

1 answer · posted 1y ago by Anonymous‭ · last activity 1y ago by TextKit‭

integration

71%

+3 −0

Finding the limit $ \lim_{x\to 0^+}e^{1/x}\sum_{n=\lfloor 1/x\rfloor}^\infty\frac{x^n}{n} $

1 answer · posted 1y ago by Snoopy‭ · last activity 1y ago by r~~‭

real-analysis limits

80%

+6 −0

What is the Name of Function for Probability of a Certain Sum on Random Die Rolls?

1 answer · posted 1y ago by James McLellan‭ · last activity 1y ago by Derek Elkins‭

statistics

71%

+3 −0

Average distance from circle's center to a point

1 answer · posted 11mo ago by TheCodidacter, or rather ACodidacter‭ · last activity 11mo ago by TheCodidacter, or rather ACodidacter‭

geometry calculus

42%

+1 −2

How to intuit P(win the same lottery twice) $= p^{2}$ vs. P(win the same lottery twice | you won the lottery once) $= p$?

2 answers · posted 1y ago by Chgg Clou‭ · edited 12mo ago by Chgg Clou‭

lottery

75%

+4 −0

Proving that $p\mid (p+1776)$ if $p$ is a prime and $p(p+1776)$ is a perfect square

2 answers · posted 1y ago by Snoopy‭ · last activity 1y ago by Snoopy‭

number-theory algebra

75%

+4 −0

Is this formula for the minimal sum correct?

1 answer · posted 1y ago by celtschk‭ · last activity 1y ago by celtschk‭

set-theory ordinal-numbers

71%

+3 −0

Do linear and group invariant functions allowed to go inside(?) integral operators?

1 answer · posted 1y ago by sepiabrown‭ · last activity 1y ago by r~~‭

integration geometric-deep-learning invariant-function

60%

+1 −0

Defining the two universes from Calculus of Constructions in LF

0 answers · posted 1y ago by user205‭ · edited 1y ago by user205‭

type-theory logic

60%

+1 −0

Are vectrices useful for calculations as opposed to formalism?

1 answer · posted 2y ago by Fred Wamsley‭ · last activity 2y ago by Derek Elkins‭

Vectrix Numerical

60%

+1 −0

Proving that this relation implies another relation on the Coxeter group [4,3,3,4].

0 answers · posted 9mo ago by WheatWizard‭ · edited 9mo ago by WheatWizard‭

group-theory coxeter-groups

33%

+0 −2

2 construals "of 100 patients presenting with a lump like the claimant’s in Gregg v Scott, 42 will be ‘cured’ if they are treated immediately."

2 answers · posted 12mo ago by DNB‭ · last activity 12mo ago by r~~‭

statistics

80%

+6 −0

Does there exist a non-zero game such that the sum of three or more copies of it is zero?

0 answers · posted 1y ago by celtschk‭

combinatorial-game-theory

75%

+4 −0

Generalization of categorical product

1 answer · posted 1y ago by r~~‭ · last activity 1y ago by Derek Elkins‭

category-theory

71%

+3 −0

how to mathematically express a relationship in which a vector can be any 3D unit vector

2 answers · posted 11mo ago by Trevor‭ · last activity 10mo ago by trichoplax‭

notation vector

71%

+3 −0

How to calculate remaining volume of a wire spool

2 answers · posted 1y ago by re89j‭ · last activity 1y ago by Olin Lathrop‭

geometry volume

71%

+3 −0

Properties of distances between adjacent vector elements and related functions

1 answer · posted 10mo ago by stofred‭ · last activity 10mo ago by Artisian‭

analysis vector recreational-mathematics integer-sequences

50%

+0 −0

A discrete-time queue Markov Chain problem

0 answers · posted 2y ago by Joe‭

Markov-chains

80%

+6 −0

What is special about the 11-cell and 57-cell?

1 answer · posted 10mo ago by WheatWizard‭ · last activity 5mo ago by ziggurism‭

polytopes

50%

+0 −0

What are the 2 arithmetic means of $x + y$ and $4x - 2y$?

2 answers · posted 2y ago by General Sebast1an‭ · last activity 2y ago by General Sebast1an‭

arithmetic sequence mean

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