(1) The electron wave equation in De-Sitter space. (2) Wave equations in conformal space. Offprints from Annals of Mathematics 36

1935. Dirac, Paul A. M. (1902-84). (1) The electron wave equation in De-Sitter space. Offprint from Annals of Mathematics 36 (1935). 657-669pp. 256 x 176 mm. Original printed wrappers, slightly sunned. (2) Wave equations in conformal space. Offprint from Annals of Mathematics 37 (1936). 429-442pp. 255 x 175 mm. Original printed wrappers, slightly sunned. Together 2 items. Very good. First Editions, Offprint Issues. In the fall of 1934 Dirac accepted an appointment at Princeton’s Institute for Advanced Study, where he spent two terms attached to the School (truncated) of Mathematics. “Dirac’s stay at Princeton resulted in two papers, both of which were published in the Annals of Mathematics, signifying that they were contributions to mathematical physics . . . Dirac examined two geometries, de Sitter space and conformal space . . .These more general spaces had previously been applied to general relativity and electromagnetism, and Dirac now showed that the fundamental questions of quantum mechanics could also be formulated in de Sitter space and conformal space” (Kragh, Dirac: A Scientific Biography, p 168). De Sitter space, named for astronomer Willem de Sitter, serves as one of the simplest mathematical models of the universe consistent with the universe’s accelerating expansion; conformal geometry, which is concerned with angles rather than distances, deals with the set of angle-preserving transformations in conformal space. . (Inventory #: 50823)