BERJAYA

30%

+1 −5

Please draw this picture to distinguish between Convex and Concave functions, featuring “bear in a conCAVE” mnemonic?

1 answer · posted 15d ago by Tynd‭ · last activity 5d ago by Glen_b‭

visualization

40%

+0 −1

Solving 2nd order nonlinear ordinary differential equations

0 answers · posted 6d ago by cpe_abdullah‭

ordinary-differential-equations nonlinear-odes

33%

+0 −2

What explains the Inventor’s Paradox? Why can more general problems, paradoxically, be easier to solve or prove?

1 answer · posted 15d ago by Tynd‭ · last activity 14d ago by Derek Elkins‭

proof

50%

+1 −1

What is an applicable way of averaging an everywhere surjective function whose graph has Hausdorff dimension $2$ with zero $2$-d Hausdorff measure?

0 answers · posted 18d ago by bharathk98‭ · edited 17d ago by bharathk98‭

probability functions sequence mean functional-analysis

77%

+5 −0

Are there other topologies on $\mathbb R$ that make it a topological field?

2 answers · posted 10mo ago by celtschk‭ · last activity 30d ago by watchmaker‭

topology

75%

+4 −0

How many elements are present in the subset of null set ?

1 answer · posted 2mo ago by Hemanth B S‭ · last activity 1mo ago by tommi‭

high-school-mathematics set-theory

71%

+3 −0

How to justify: for every integer $r$ in $[1, k-1]$, there is an integer $j$ in $[0, k-1]$, such that $r + j = k$

2 answers · posted 1mo ago by Penelope‭ · last activity 1mo ago by Derek Elkins‭

number-theory

25%

+0 −4

why do lotteries require computer to generate some set of numbers, instead of letting players pick all numbers?

1 answer · posted 5mo ago by RichmGreen‭ · last activity 2mo ago by watchmaker‭

lottery

66%

+2 −0

In this representation of surreal numbers and gaps with classes of ordinal numbers, are all gaps represented?

0 answers · posted 2mo ago by celtschk‭

set-theory ordinal-numbers surreal-numbers

77%

+5 −0

What complexity implications are there from not being in an abstract family of languages?

0 answers · posted 2mo ago by WheatWizard‭ · edited 2mo ago by WheatWizard‭

formal-language abstract-family-of-languages

75%

+4 −0

Is this a proper measure for irrationality?

1 answer · posted 2mo ago by celtschk‭ · last activity 2mo ago by r~~‭

classification

40%

+0 −1

Papers which solve the summary of my paper involving expectations, hausdorff measure, prevelant/shy sets, partitions, samples, pathways & entropy.

1 answer · posted 2mo ago by bharathk98‭ · last activity 2mo ago by tommi‭

analysis functional-analysis reference-request hausdorff-dimension hausdorff-measure

77%

+5 −0

Name for a graph invariant: minimal positive integer $d$ such that the graph is $d$-biclique-free

0 answers · posted 3mo ago by nsajko‭ · edited 3mo ago by nsajko‭

nomenclature graph-theory graph-invariant undirected-graph

77%

+5 −0

Is the "mucube" homeomorphic to the loch ness monster?

1 answer · posted 6mo ago by WheatWizard‭ · last activity 5mo ago by WheatWizard‭

topology

22%

+0 −5

Why better to buy one ticket for multiple draws, instead of multiple tickets for the same draw - in terms of variance, skewness, kurtosis?

0 answers · posted 5mo ago by RichmGreen‭

lottery

72%

+6 −1

How to validate if the horizontal and vertical tangent lines exist for implicit functions?

2 answers · posted 1y ago by Bennyshinichi‭ · last activity 6mo ago by Monica Cellio‭

calculus differentiation

66%

+2 −0

What is the unit element in the space of more-than-2 indexed tensors?

0 answers · posted 7mo ago by deleted user · edited 7mo ago by deleted user

tensors

60%

+1 −0

Lifting a graph "folding" to a covering space

0 answers · posted 7mo ago by WheatWizard‭ · edited 7mo ago by WheatWizard‭

graph-theory algebraic-topology

77%

+5 −0

How to understand the distribution of a random variable constrained on a linear system of equations?

0 answers · posted 9mo ago by mr Tsjolder‭

proof linear-algebra distributions

60%

+1 −0

What are the known chiral polytopes of full rank?

1 answer · posted 9mo ago by WheatWizard‭ · last activity 9mo ago by WheatWizard‭

euclidean-geometry polytopes

57%

+2 −1

What are some introductory texts for learning acoustics modeling using FEM-BEM simulations?

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

reference-request fem bem acoustics

66%

+2 −0

The effect of measurement accuracy and rounding on hypothesis testing

2 answers · posted 1y ago by tommi‭ · last activity 9mo ago by deleted user

statistics hypothesis-testing rounding

75%

+7 −1

Probability that six random numbers between 0 and 1 are the lengths of a tetrahedron's edges

0 answers · posted 1y ago by JRN‭ · last activity 9mo ago by deleted user

probability

77%

+5 −0

Prime factor pattern in numbers one less than a power of 2

1 answer · posted 9mo ago by trichoplax‭ · edited 9mo ago by trichoplax‭

power pattern factoring Prime-numbers

50%

+0 −0

Does the root of the Taylor series expansion converge to the inverse of a function as the number of terms increases?

0 answers · posted 11mo ago by theabbie‭

limits polynomials series taylor-expansion

60%

+1 −0

Compactness of the Propositional Calculus

1 answer · posted 1y ago by kouty ‭ · last activity 11mo ago by kouty ‭

logic

75%

+4 −0

Is there an equational law satisfied by "linear kei" but not free kei?

0 answers · posted 12mo ago by WheatWizard‭ · last activity 12mo ago by celtschk‭

geometry abstract-algebra

60%

+1 −0

High-Probability Lower Bound for Sums of Conditional Probabilities in IID Sequences on the Unit Sphere

2 answers · posted 1y ago by Alex de Ruijter‭ · last activity 12mo ago by Alex de Ruijter‭

probability

66%

+2 −0

Area of the surface of revolution of a Reuleaux triangle

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

area Reuleaux-triangle surface-of-revolution

60%

+1 −0

Volume enclosed by the surface of revolution of a Reuleaux triangle

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

volume Reuleaux-triangle surface-of-revolution

75%

+4 −0

How do I (efficiently) sample from the interior of a convex polytope?

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

statistics convex-hull polytopes sampling

25%

+0 −4

Why does group play equalize a lottery's actual Expected Value to the effective Expected Value? [closed]

0 answers · posted 1y ago by Nen‭ · closed 1y ago by Peter Taylor‭

lottery

71%

+3 −0

How to prove that solutions of semilinear differential equations is even function?

0 answers · posted 1y ago by Richard‭

calculus partial-differential-equations

71%

+3 −0

Why $\gamma\cdot\operatorname{grad}u<0$ in the Theorem? (Nirenberg academic paper)

1 answer · posted 1y ago by Richard‭ · edited 1y ago by Snoopy‭

geometry functional-analysis partial-differential-equations

40%

+0 −1

Questions regarding the Kurepa Conjecture

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

number-theory soft-question reference-request factorial conjecture

66%

+2 −0

Reflection in the plane with polar coordinates

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

geometry coordinate-geometry linear-algebra polar

66%

+2 −0

Holomorphic function on a connected bounded open subset of the complex plane

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

complex-analysis

66%

+2 −0

Does the series $\sum_{n=1}^{\infty} \frac{n^n}{n!} e^{-n}$ converge?

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

calculus real-analysis series

60%

+1 −0

Complex functions and inner product $\langle \frac{\partial f}{\partial z} , g\rangle $

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

complex-analysis summation integral functional-analysis

42%

+1 −2

Search & Probability

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

probability

71%

+3 −0

Is there a closed formula for multiplication of imaginary units in the direct limit of the Cayley-Dickson construction?

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

algebra

71%

+3 −0

Find the value of $\sum_{k=1}^\infty\frac{k^2}{k!}$

3 answers · posted 1y ago by Snoopy‭ · last activity 1y ago by Derek Elkins‭

complex-analysis real-analysis series

66%

+2 −0

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

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

real-analysis

80%

+6 −0

Does this generalization of path-connectedness also cover general connectedness?

1 answer · posted 5y ago by celtschk‭ · last activity 1y ago by ronno‭

topology connectedness

50%

+0 −0

Find all functions (f:\mathbb N\to\mathbb N) such that for all primes (p), (p\mid f(a)^{f(p)}-f(b)^p\iff p\mid a-b)

0 answers · posted 1y ago by TheCodidacter, or rather ACodidacter‭ · edited 1y ago by TheCodidacter, or rather ACodidacter‭

functions solution-verification modular-arithmetic

71%

+3 −0

Am I taking the antiderivative of |x| correctly?

1 answer · posted 1y ago by CrSb0001‭ · edited 1y ago by The Amplitwist‭

calculus integration recreational-mathematics

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 2y ago by Chgg Clou‭ · edited 1y ago by Michael Hardy‭

combinatorics

77%

+5 −0

What is the probability density function for the tau distribution?

2 answers · posted 2y ago by mr Tsjolder‭ · last activity 1y ago by Michael Hardy‭

statistics distributions

66%

+2 −0

Example of $f:[0,1]\to\mathbf{R}$ with $\lim_{a\to 0^+}\int_a^1f(x)dx=L $ for some real number $L$ but $\int_0^1|f(x)|dx=\infty $

2 answers · posted 3y ago by Snoopy‭ · last activity 1y ago by Michael Hardy‭

real-analysis improper-integral

75%

+4 −0

Is it known whether most numbers are normal or not

1 answer · posted 2y ago by Grove‭ · last activity 1y ago by Michael Hardy‭

number-theory

Communities