In mathematics, the Demazure conjecture is a conjecture about representations of algebraic groups over the integers made by Demazure (1974, p. 83). The conjecture implies that many of the results of his paper can be extended from complex algebraic groups to algebraic groups over fields of other characteristics or over the integers. V. Lakshmibai, C. Musili, and C. S. Seshadri (1979) showed that Demazure's conjecture (for classical groups) follows from their work on standard monomial theory, and Peter Littelmann extended this to all reductive algebraic groups.

• Demazure, Michel (1974). "Désingularisation des variétés de Schubert généralisées". Annales Scientifiques de l'École Normale Supérieure. Série 4. 7: 53–88. doi:10.24033/asens.1261. ISSN 0012-9593. MR 0354697.
• Lakshmibai, V.; Musili, C.; Seshadri, C. S. (1979). "Geometry of G/P". Bulletin of the American Mathematical Society. New Series. 1 (2): 432–435. doi:10.1090/S0273-0979-1979-14631-7. ISSN 0002-9904. MR 0520081.