Henry Helson

• Harmonic analysis
• Lectures on invariant subspaces
• Linear algebra
• Linear Operators in Function Space
• Operators in Indefinite Metric Spaces, Scattering Theory, and Other Topics (Operator Theory, Advances and Applications)
• The spectral theorem
• Analysis and Linear Lagebra
• Calculus and Probability
• Dirichlet Series
• Honors Calculus
• Invariant subspaces and allied topics
• Méthodes complexes et méthodes de Hilbert en analyse de Fourier