Mathematics

22%

+0 −5

How to intuit that if you destroy someone else's lottery ticket, you didn't deprive her of a chance of winning the lottery?

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

lottery

66%

+4 −1

is arithmetic finitely consistent?

0 answers · posted 3mo ago by Jason‭

proof logic peano-arithmetic incompletness consistency

37%

+1 −3

Solely by eye, how can 16 year olds visually distinguish $\color{red}{\vec{b} - \vec{r}}$ from $\color{limegreen}{|\vec{b}| - |\vec{r}|}$ ?

2 answers · posted 8mo ago by Tortilla‭ · last activity 8mo ago by Olin Lathrop‭

visualization

50%

+1 −1

What are the “increasingly stable consequences of the large cardinal hierarchy”?

0 answers · posted 3mo ago by Julius H.‭

set-theory

71%

+3 −0

Is there a $\Delta$-complex structure on the sphere with less than three $0$-simplices?

1 answer · posted 1mo ago by The Amplitwist‭ · last activity 1mo ago by Derek Elkins‭

algebraic-topology delta-complex

50%

+0 −0

Introducing a dependent function in the metalanguage without pi-types

0 answers · posted 21d ago by user205‭ · edited 21d ago by user205‭

type-theory

60%

+1 −0

Is there a "regular" quasi-convex function $f:\Bbb R^2 \to \Bbb R$ that is not a monotone transformation of any convex function?

0 answers · posted 1y ago by Pavel Kocourek‭

multivariable-calculus real-analysis convex-analysis monotone-functions

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

Connection between caustics and conjugate points?

0 answers · posted 1y ago by tommi‭

differential-geometry

80%

+6 −0

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

1 answer · posted 11mo ago by WheatWizard‭ · last activity 6mo ago by ziggurism‭

polytopes

66%

+2 −0

Is it known whether most numbers are normal or not

0 answers · posted 6mo ago by Grove‭

number-theory

60%

+1 −0

What does it mean by saying that $C([0,1])$ is a subset of $L^\infty([0,1])$?

1 answer · posted 4mo ago by Snoopy‭ · last activity 4mo ago by Snoopy‭

real-analysis

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 10mo ago by Chgg Clou‭ · edited 10mo ago by Chgg Clou‭

lottery

55%

+3 −2

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

1 answer · posted 10mo ago by Ethen‭ · last activity 10mo ago by Derek Elkins‭

lottery

50%

+0 −0

Finding a quadratic that has solutions to given values

1 answer · posted 1y ago by brah‭ · last activity 1y ago by trichoplax‭

algorithm approximation numerical-analysis

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 8mo ago by Agent Smith‭

statistics

37%

+1 −3

Are these introductory logic textbooks wrong to teach ‘unless’ = ‘or’? [duplicate]

0 answers · posted 4mo ago by 8500 Ward‭ · closed as duplicate 4mo ago by Peter Taylor‭

logic

66%

+2 −0

The derivatives of a function at a boundary point

1 answer · posted 4mo ago by tommi‭ · last activity 4mo ago by Snoopy‭

derivatives real-analysis

71%

+3 −0

If both $\lim_{x\to\infty}f(x)$ and $\lim_{x\to\infty}f'(x)$ exist, then $\lim_{x\to\infty}f'(x)=0$.

1 answer · posted 4mo ago by Snoopy‭ · last activity 4mo ago by Snoopy‭

real-analysis

28%

+0 −3

What is a “first-order substructural logic that has a cut-free sequent calculus”?

1 answer · posted 3mo ago by Julius H.‭ · last activity 3mo ago by Dan Doel‭

logic

50%

+0 −0

Calculation of limit

0 answers · posted 7mo ago by Klein Moretti‭

calculus analysis limits applied-mathematics

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 1y ago by DNB‭ · last activity 1y ago by r~~‭

statistics

66%

+2 −0

Proving $|{\bf R}^{\bf R}|=|2^{\bf R}|$ using the Schroeder-Bernstein Theorem

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

set-theory

66%

+2 −0

Using convexity in the proof of Hölder’s inequality

1 answer · posted 4mo ago by Snoopy‭ · last activity 1mo ago by Snoopy‭

real-analysis

71%

+3 −0

Classification for involutory real infinite series

1 answer · posted 10mo ago by nsajko‭ · last activity 9mo ago by Peter Taylor‭

classification real-analysis inverse polynomials series

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

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

28%

+0 −3

Which other Real Analysis textbooks unusually recommend ending delta-epsilon proofs with a cluttered, bedecked $\epsilon$? [closed]

0 answers · posted 1y ago by TextKit‭ · closed 1y ago by Mithical‭

real-analysis

14%

+0 −10

How can 3/1 ≡ 1/(1/3), when left side features merely integers, but right side features a repetend?

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

arithmetical-hierarchy

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

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

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

22%

+0 −5

How can school children intuit why over 100, D is larger? But under 100, D% is larger?

2 answers · posted 1y ago by Chgg Clou‭ · last activity 6mo ago by Agent Smith‭

high-school-mathematics

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

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

80%

+6 −0

Criteria for solvable Minesweeper game?

0 answers · posted 11mo ago by Olin Lathrop‭ · edited 11mo ago by Olin Lathrop‭

algorithm

60%

+1 −0

Dividing a cuboid in four

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

geometry

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

33%

+1 −4

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

2 answers · posted 1y ago by DNB‭ · last activity 8mo ago by Agent Smith‭

probability

71%

+3 −0

organizing a library

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

combinatorics recreational-mathematics

54%

+4 −3

Is it worth it to replace Arabic numerals with Kaktovik numerals?

1 answer · posted 1y ago by GoldenGold‭ · last activity 1y ago by DavidCary‭

Kaktovik numerals

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

71%

+3 −0

Prove $e^x \ge x+1 \\\; \forall x \in \mathbb{R}$ using induction

1 answer · posted 1y ago by Carefree Explorer‭ · edited 1y ago by Derek Elkins‭

limits induction inequality solution-verification

77%

+5 −0

Finding a single row of Matrix after exponentiation

1 answer · posted 12mo ago by theabbie‭ · edited 12mo ago by trichoplax‭

exponent algorithm matrices

81%

+7 −0

How can I choose a point from a uniform distribution within a regular polygon?

2 answers · posted 9mo ago by Karl Knechtel‭ · last activity 9mo ago by trichoplax‭

plane-geometry applied-mathematics sampling

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

40%

+0 −1

While pictorializing $|x - y| < |x + y|$, how can 1 picture simultaneously prove (Reverse) △ Inequalities, $|x-y| ≤ |x|+|y|, |x|-|y| ≤ |x-y|$? [duplicate]

0 answers · posted 8mo ago by Tortilla‭ · closed as duplicate 8mo ago by Peter Taylor‭

visualization

81%

+7 −0

Prove that 49 is the only prime square to be followed by twice a prime square and then a semiprime

1 answer · posted 1y ago by Peter Taylor‭ · last activity 11mo ago by Servaes‭

number-theory integer-sequences

75%

+4 −0

Optimising a 3 value problem (well 2 really)

1 answer · posted 2y ago by KalleMP‭ · last activity 2y ago by Peter Taylor‭

analysis formula algorithm

66%

+2 −0

Unification and generalization of limit and colimit

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

limits category-theory

Communities