 Orthogonal Projection

Online text: textbooks.math.gatech.edu/ila/projections.html

Section of Interactive Linear Algebra by Dan Margalit and others, by Dan Margalit and Joseph Rabinoff; no separate chapter byline or date is asserted. The parent record's 2019 year dates the front matter; the colophon copyright is 2017.

Cited passages: §6.3.1, Orthogonal decomposition theorem and Closest vector and distance; §6.3.2, Properties of Orthogonal Projections.