Inner products and the spectral theorem (intro)
Orthogonal projections
Linear algebra · Standard syllabus
Topic
Orthogonal projections
Practice by unit: Inner products and the spectral theorem (intro)
Undergraduate Linear Algebra — scope drawn from Axler Linear Algebra Done Right (open PDF), Treil Linear Algebra Done Wrong, Beezer A First Course in Linear Algebra, and AIM-approved OER texts.