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Proof of `Elementary properties of the growth function` (6th statement)

groundedproofs/Lax606786Proofs/GrowthFunction.lean · lax-606786

What this proof establishes

Assuming the claims on the left, the claim on the right holds — checked by the archive's pipeline. Proof code is not displayed here.

Read the Lean proof on GitLab

Description

gTg_T on a line is just the norm of the image of a unit spanning vector: the unit sphere of spanuspan{u} is u,−u{u, -u}.