The Generalized Wielandt Inequality in Inner Product Spaces
Minghua Lin, Gord Sinnamon · arXiv (Cornell University) · 2012
A new inequality between angles in inner product spaces is formulated and proved. It leads directly to a concise statement and proof of the generalized Wielandt inequality, including a simple description of all cases of equality. As a consequence, several recent results in matrix analysis and inner product spaces are improved.