Both Stephen R. Donaldson and P. D. Ouspensky are known for esotericism?
Stephen R. Donaldson Stephen Reeder Donaldson (born May 13, 1947) is an American fantasy, science fiction and mystery novelist, most famous for "The Chronicles of Thomas Covenant", his ten-novel fantasy series. His work is characterized by psychological complexity, conceptual abstractness, moral bleakness, and the use of an arcane vocabulary, and has attracted critical praise for its "imagination, vivid characterizations, and fast pace". He earned his bachelor's degree from The College of Wooster and a Master's degree from Kent State University. He currently resides in New Mexico.
Donaldson–Thomas theory In mathematics, specifically algebraic geometry, Donaldson–Thomas theory is the theory of Donaldson–Thomas invariants. Given a compact moduli space of sheaves on a Calabi–Yau threefold, its Donaldson–Thomas invariant is the virtual number of its points, i.e., the integral of the cohomology class 1 against the virtual fundamental class. The Donaldson–Thomas invariant is a holomorphic analogue of the Casson invariant. The invariants were introduced by . Donaldson–Thomas invariants have close connections to Gromov–Witten invariants of algebraic three-folds and the theory of stable pairs due to Pandharipande and Thomas.