Proof of `Bernstein numbers under a projection` (1st statement)

groundedproofs/Lax606786Proofs/GrassmannianContraction.lean · lax-606786

What this proof establishes

no assumptions

thm✓Lax606786.GrowthUnderProjections (1st statement)

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

Every $(k + l)$ -dimensional subspace meets the range of the projection in dimension $l$ .