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Permutations, group theory, discrete calculus, integer sequences, combinatorial optimization...

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Numerically 2026 is unremarkable yet happy: semiprime with primitive roots

CONTRIBUTED BY: Anton Antonov | 1 day ago BY: Srinivasa Raghava
Staff Picks , Algebra , Discrete Mathematics , ...
7
REPLIES
2.1K
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Extended Rule-110 family via ANF over GF(2): prior art and validation of a factor onto Rule 110

QUESTION FROM: Tigran Nersissian | 3 days ago
Algebra , Computational Systems , Discrete Mathematics , ...
0
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41
VIEWS

MGroups package: teaching finite group theory

CONTRIBUTED BY: Naman T. | 11 days ago BY: EDITORIAL BOARD
Staff Picks , Algebra , Discrete Mathematics , Education , ...
1
REPLIES
197
VIEWS

How to solve tectonic puzzles using graph theory

CONTRIBUTED BY: Alejandra Ortiz Duran | 17 days ago BY: EDITORIAL BOARD
Staff Picks , Computer Science , Discrete Mathematics , ...
2
REPLIES
360
VIEWS

Patchwork with coexisting cellular automata

CONTRIBUTED BY: Phileas Dazeley-Gaist | 18 days ago BY: EDITORIAL BOARD
Staff Picks , Computational Systems , Discrete Mathematics , ...
1
REPLIES
218
VIEWS

Companion to "Base Fibonacci - Numberphile"

CONTRIBUTED BY: Shenghui Yang | 26 days ago BY: EDITORIAL BOARD
Staff Picks , Algebra , Discrete Mathematics , ...
1
REPLIES
270
VIEWS

Visual explanation of the problem Putnam 2025 A3

CONTRIBUTED BY: Shenghui Yang | 2 months ago BY: EDITORIAL BOARD
Staff Picks , Discrete Mathematics , Game Development , ...
1
REPLIES
652
VIEWS

Maze making using graphs based on rectangular and hexagonal grids

CONTRIBUTED BY: Anton Antonov | 2 months ago BY: EDITORIAL BOARD
Staff Picks , Challenges , Computational Humanities , ...
1
REPLIES
642
VIEWS

Introduction to dynamic economic models: the ISLM model with the capital stock and debt

CONTRIBUTED BY: Hee-Young Shin | 2 months ago BY: EDITORIAL BOARD
Staff Picks , Algebra , Discrete Mathematics , ...
1
REPLIES
467
VIEWS

Introduction to dynamic economic models: The ISLM model

CONTRIBUTED BY: Hee-Young Shin | 2 months ago BY: EDITORIAL BOARD
Staff Picks , Algebra , Calculus , Discrete Mathematics , Economics , ...
1
REPLIES
612
VIEWS

Introduction to dynamic economic models: Keynes's AD model with the capital stock and the debt

CONTRIBUTED BY: Hee-Young Shin | 2 months ago BY: EDITORIAL BOARD
Staff Picks , Algebra , Calculus , Discrete Mathematics , Economics , ...
1
REPLIES
461
VIEWS

[Polihacks] The sons of Bill Gates: lognormal simulation cellular model

CONTRIBUTED BY: Adael Reyes | 3 months ago
Computational Systems , Discrete Mathematics , Mathematics , ...
0
REPLIES
390
VIEWS

Extending Matt Parker's List: 4 Primes p where tan(p) > p

CONTRIBUTED BY: Greg Hurst | 3 months ago BY: thunkii thunkies
Staff Picks , Discrete Mathematics , Graphics and Visualization , ...
4
REPLIES
3.9K
VIEWS

Random minimum spanning trees and Riemann Zeta function

CONTRIBUTED BY: Shenghui Yang | 3 months ago BY: EDITORIAL BOARD
Staff Picks , Curated Data , Discrete Mathematics , ...
1
REPLIES
693
VIEWS

Verifying origin/meaning of rule 54 formula on MathWorld

QUESTION FROM: Rudi Bjørnsen Stranden | 4 months ago
Computational Systems , Discrete Mathematics , Wolfram Science
0
REPLIES
408
VIEWS

Recamán's sequence, semi circles and spooky sound

CONTRIBUTED BY: Shenghui Yang | 4 months ago BY: Vitaliy Kaurov
Staff Picks , Audio, Sound and Music , Discrete Mathematics , ...
2
REPLIES
952
VIEWS

Exploring moduli of dyadically resolved trinomials

CONTRIBUTED BY: Shenghui Yang | 5 months ago BY: EDITORIAL BOARD
Staff Picks , Algebra , Discrete Mathematics , ...
1
REPLIES
1.2K
VIEWS

Mathematical Games: knots and crossing numbers

CONTRIBUTED BY: Ed Pegg | 5 months ago BY: EDITORIAL BOARD
Staff Picks , Challenges , Demonstrations , Discrete Mathematics , ...
1
REPLIES
2.1K
VIEWS

(6n-1) type prime and (6n + 1) type prime

CONTRIBUTED BY: Koichi Ohno | 5 months ago BY: William Donelson
Discrete Mathematics , Graphics and Visualization , Mathematics , ...
2
REPLIES
12.5K
VIEWS

Hamiltonian-type paths without crossings in regular polygons

CONTRIBUTED BY: Shenghui Yang | 5 months ago BY: EDITORIAL BOARD
Staff Picks , Challenges , Computer-Based Maths , Computer Science , ...
1
REPLIES
1.9K
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