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Discrete Mathematics

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

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Rule 30 exact binomial-Lucas lifting: boolean logic to integer coefficients, Stirling & support sets

CONTRIBUTED BY: Tigran Nersissian | 5 days ago BY: Tigran Nersissian

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394

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Hidden symmetry in permutation space

CONTRIBUTED BY: David Vasholz | 2 months ago BY: EDITORIAL BOARD

Staff Picks , Algebra , Discrete Mathematics , ...

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405

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From integers to art: fractal geometry of digit-sum parities

CONTRIBUTED BY: Sergio Quiroga | 2 months ago BY: Sergio Quiroga

Staff Picks , Discrete Mathematics , Geometry , ...

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488

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Numerically 2026 is unremarkable yet happy: semiprime with primitive roots

CONTRIBUTED BY: Anton Antonov | 2 months ago BY: Srinivasa Raghava

Staff Picks , Algebra , Discrete Mathematics , ...

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MGroups package: teaching finite group theory

CONTRIBUTED BY: Naman T. | 3 months ago BY: EDITORIAL BOARD

Staff Picks , Algebra , Discrete Mathematics , Education , ...

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486

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How to solve tectonic puzzles using graph theory

CONTRIBUTED BY: Alejandra Ortiz Duran | 3 months ago BY: EDITORIAL BOARD

Staff Picks , Computer Science , Discrete Mathematics , ...

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Patchwork with coexisting cellular automata

CONTRIBUTED BY: Phileas Dazeley-Gaist | 3 months ago BY: EDITORIAL BOARD

Staff Picks , Computational Systems , Discrete Mathematics , ...

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540

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Companion to "Base Fibonacci - Numberphile"

CONTRIBUTED BY: Shenghui Yang | 3 months ago BY: EDITORIAL BOARD

Staff Picks , Algebra , Discrete Mathematics , ...

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625

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Visual explanation of the problem Putnam 2025 A3

CONTRIBUTED BY: Shenghui Yang | 4 months ago BY: EDITORIAL BOARD

Staff Picks , Discrete Mathematics , Game Development , ...

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1.3K

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Maze making using graphs based on rectangular and hexagonal grids

CONTRIBUTED BY: Anton Antonov | 4 months ago BY: EDITORIAL BOARD

Staff Picks , Challenges , Computational Humanities , ...

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995

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

CONTRIBUTED BY: Hee-Young Shin | 4 months ago BY: EDITORIAL BOARD

Staff Picks , Algebra , Discrete Mathematics , ...

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679

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Introduction to dynamic economic models: The ISLM model

CONTRIBUTED BY: Hee-Young Shin | 4 months ago BY: EDITORIAL BOARD

Staff Picks , Algebra , Calculus , Discrete Mathematics , Economics , ...

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951

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

CONTRIBUTED BY: Hee-Young Shin | 4 months ago BY: EDITORIAL BOARD

Staff Picks , Algebra , Calculus , Discrete Mathematics , Economics , ...

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626

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

CONTRIBUTED BY: Adael Reyes | 5 months ago

Computational Systems , Discrete Mathematics , Mathematics , ...

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583

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

CONTRIBUTED BY: Greg Hurst | 5 months ago BY: thunkii thunkies

Staff Picks , Discrete Mathematics , Graphics and Visualization , ...

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4.5K

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Random minimum spanning trees and Riemann Zeta function

CONTRIBUTED BY: Shenghui Yang | 5 months ago BY: EDITORIAL BOARD

Staff Picks , Curated Data , Discrete Mathematics , ...

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Recamán's sequence, semi circles and spooky sound

CONTRIBUTED BY: Shenghui Yang | 6 months ago BY: Vitaliy Kaurov

Staff Picks , Audio, Sound and Music , Discrete Mathematics , ...

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1.2K

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Exploring moduli of dyadically resolved trinomials

CONTRIBUTED BY: Shenghui Yang | 7 months ago BY: EDITORIAL BOARD

Staff Picks , Algebra , Discrete Mathematics , ...

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1.5K

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Mathematical Games: knots and crossing numbers

CONTRIBUTED BY: Ed Pegg | 7 months ago BY: EDITORIAL BOARD

Staff Picks , Challenges , Demonstrations , Discrete Mathematics , ...

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3.2K

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

CONTRIBUTED BY: Koichi Ohno | 7 months ago BY: William Donelson

Discrete Mathematics , Graphics and Visualization , Mathematics , ...

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13.1K

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350 Discussions

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Alejandra Ortiz Duran

2 months ago

Phileas Dazeley-Gaist

2 months ago

Shenghui Yang

12 days ago

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