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There are several conjectures known as the Hadwiger conjecture or Hadwiger's conjecture. They include:

• Hadwiger conjecture (graph theory), a relationship between the number of colors needed by a given graph and the size of its largest clique minor
• Hadwiger conjecture (combinatorial geometry) that for any n-dimensional convex body, at most 2 smaller homothetic bodies are necessary to contain the original
• Hadwiger's conjecture on dissection into orthoschemes

See also

• Hadwiger–Nelson problem on the chromatic number of unit distance graphs in the Euclidean plane
• Hadwiger's theorem characterizing measure functions in Euclidean spaces

• Disambiguation pages