Matemática Ciencias Exactas Frames Polar decomposition Aluthge transform Generalized inverses Angles Gaussian analytic functions Projections Riesz frames Similarity orbit Spectral order Stable manifold theorem Algoritmos Angle between subspaces Angular metric Boyd indices Combinatorics Compatibility Convex functions De Branges spaces Ergodicity Espacios de Hardy Espacios de Paley Wiener Finite frame First intensity function Fourier Fourier expansions Fuglede's conjecture Functional calculus