The operator theory of the pseudo-inverse I. Bounded operators

A generalized inverse for matrices

Roger Penrose · Mathematical Proceedings of the Cambridge Philosophical Society · 1955 · 4.5K citations · Full text

Natural Sciences, Computer Science, Algebra +12

Uniformly convex spaces

James A. Clarkson · Transactions of the American Mathematical Society · 1936 · 932 citations · Full text

New results in linear prediction and filtering theory Trans. AMSE

R. E. Kalman · Medical Entomology and Zoology · 1961 · 363 citations

Computing, Electrical Engineering, Mathematics +13

Some Applications of the Pseudoinverse of a Matrix

T. N. E. Greville · SIAM Review · 1960 · 349 citations

Natural Sciences, Mathematics, Algorithms +11

The Pseudoinverse of a Rectangular or Singular Matrix and Its Application to the Solution of Systems of Linear Equations

T. N. E. Greville · SIAM Review · 1959 · 251 citations

Natural Sciences, Mathematics, Algorithms +13