Lemma

Combinatorics · Chapter 10 of 10

Graph theory

6 curated · 9 from open sources

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Curated

6
#TitleDifficultySourceTags
11The odd shakers are evenEasyLemmaHandshake lemmaSum of degrees+1
629Edges of a complete graphEasyLemmaGraph theory
630Edges of a treeEasyLemmaGraph theory
631The handshake lemmaEasyLemmaGraph theory
632Counting facesEasyClassicalGraph theory
633Colouring a pentagonEasyLemmaGraph theory

From open sources

9

Complete problems only, with worked solutions first. Show everything

#TitleDifficulty
128434Graph Basics · Example 1Easy
128435Graph Basics · Example 2Easy
128437Graph Structures · Example 2Easy
128438Graph Structures · Example 3Easy
128444Applying ConnectednessEasy
128445Hamilton Cycles · Example 1Easy
128448Traveling Salesperson Problem · Example 1Easy
128449Traveling Salesperson Problem · Example 2Easy
128446Hamilton Cycles · Example 2Easy