The weyl calculus of pseudo‐differential operators

Fourier integral operators. I

Lars Hörmander · Acta Mathematica · 1971 · 2.4K citations · Full text

Natural Sciences, Mathematics, Applied Mathematics +9

The Index of Elliptic Operators: III

Michael Atiyah, I. M. Singer · Annals of Mathematics · 1968 · 1.3K citations

Natural Sciences, Electrical Engineering, Cryptography +9

The Index of Elliptic Operators: I

Michael Atiyah, I. M. Singer · Annals of Mathematics · 1968 · 1.2K citations

Natural Sciences, Electrical Engineering, Algebra +8

An algebra of pseudo‐differential operators

J. J. Kohn, Louis Nirenberg · Communications on Pure and Applied Mathematics · 1965 · 663 citations

Natural Sciences, Mathematics, Algebra +11

Pseudo-differential Operators and Non-elliptic Boundary Problems

Lars Hörmander · Annals of Mathematics · 1966 · 496 citations

Natural Sciences, Mathematics, Physics +13