ConceptSt(k, D)
Stiefel Manifold
The set of all D×k matrices with orthonormal columns; it is the standard mathematical tool for handling orthogonality constraints in optimization.
Timeline (last 90 days)
Nov 6
The paper optimizes on the Stiefel manifold St(k, D), using a fourth-order polar decomposition retraction together with a Neumaier compensated accumulator, and reports an orthogonality error of ||X^T X - I_k|| ≤ 10^-15 with no catastrophic drift.
Unverified50%