ON ILL-POSED PROBLEMS AND THE METHOD OF CONJUGATE GRADIENTS

The theory of Tikhonov regularization for Fredholm equations of the first kind

1984 • 1,219 citations

Orthogonal polynomials

1997 • 155 citations

On the Convergence of the Conjugate Gradient Method for Singular Linear Operator Equations

1972 • 151 citations

Steepest descent for singular linear operators with nonclosed range

1971 • 35 citations

Proof of a conjecture of Askey on orthogonal expansions with positive coefficients

1975 • 15 citations