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By
kintali
on
Dec. 3, 2012

Prove that for every planar graph $G$ there exists an integer $k$ such that $G$ is isomorphic to a minor of the $k \times k$ grid.

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By
kintali
on
June 29, 2012
| Updated
on
Oct. 19, 2012

By
trueshelf
on
Oct. 3, 2013
| Updated
on
Oct. 4, 2013