# Concept derivation guides

299 concept teaching guides, separate from the 36,000 individual question derivations.

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Concept guide



## [Vertex covers and deletion certificates on a star](/en/derivations/derivation-mko-vertex-cover-01/?from=%2Fen%2Fderivations%2F%3Fq%3Dmko-vertex-cover)

Audit covers edgewise and distinguish minimal from minimum.

Vertex cover

derivation-mko-vertex-cover-01





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