🕸️ Combinatoire & Théorie des Graphes

Pascal's Triangle — Binomial Coefficients & CombinatoricsClick any cell in Pascal's triangle to reveal C(n,k) — toggle Sierpiński parity, Fibonacci… Graph ColoringColour a graph so no two neighbours match: compare greedy, Welsh-Powell and DSatur orderings… Inclusion-Exclusion Principle — Venn Diagrams & CountingOverlap two or three sets in a Venn diagram and see the alternating add-and-subtract rule… Catalan NumbersNewOne sequence counts them all: balanced parentheses, Dyck paths, binary trees, polygon… Combinatorics & CountingNewAdjust n and k to watch permutations, combinations and the multiplication principle build…