| Damianou, Pantelis: University of Cyprus. Lie Groups; Integrable Systems; Poisson Geometry; Number Theory. Publications, talks. |
| Daniel, Stephan: University of Cardiff. Analytic number theory. Publications. |
| Darmon, Henri: McGill University. Algebraic number theory, with a special emphasis on elliptic curves, modular forms, and their associated L-functions. |
| Dasgupta, Samit: Harvard University. Arithmetic algebraic geometry. Preprints. |
| David, Chantal: Concordia University, Montréal. Drinfeld modules, Galois representations. Publications, talks. |
| Deanin, Alice: Villanova University. Computational number theory and Diophantine approximation. Teaching material, resources. |
| Deligne, Pierre: Institute for Advanced Study. Publications, preprints. |
| Denef, Jan: University of Leuven. Number Theory, Algebraic Geometry, Singularity Theory and Mathematical Logic. Publications, software. |
| Deng An-Wen: Academica Sinica, Taiwan. Number Theory and Algebraic Geometry. Publications. |
| Diamond, Fred: Brandeis University. Modular forms and Galois representations. CV, publications and preprints. |
| Diamond, Harold G.: University of Illinois at Urbana-Champaign. Analytic number theory, distribution of primes, arithmetic functions, sieve methods. Publications. |
| Diaz y Diaz, Francisco: Université Bordeaux I. Computations in number fields. Preprints. |
| Dickinson, Detta: NUI Maynooth. Measure theory and metric Diophantine approximation: Diophantine approximation on manifolds. |
| Dickinson, Mark: University of Pittsburgh. Contact, teaching information. |
| Diem, Claus: University of Leipzig. Arithmetic algebraic geometry: structure and arithmetic of abelian varieties; discrete logarithm problems; the regular inverse Galois problem. Publications, thesis. |
| Dienst, Thilo: Universität Dortmund. Geometry of Numbers; Polytopes; Quadratic Forms; Diophantine Approximation; History of Mathematics. Publications, thesis, resources. |
| Doche, Christophe: Macquarie University, Sydney. Analytic and algorithmic number theory: Mahler measure and Lehmer's problem; Rudin-Shapiro polynomials. Publications, thesis, Pari/GP code. |
| Dodson, Maurice: University of York. Metrical Diophantine approximation, harmonic analysis and applications to signal processing, chaos and biology. Publications, teaching material. |
| Dokchitser, Tim: University of Durham. Arithmetic algebraic geometry. Publications, thesis, Pari/GP software. |
| Doud, Darrin: Brigham Young University. Cohomology of arithmetic groups, Galois representations. Papers, resources. |
| Dresden, Greg: Washington and Lee University. Mahler measure of polynomials. Publications. |
| Drinen, Michael: Willamette University. Iwasawa theory and elliptic curves. Publications, teaching material. |
| Drmota, Michael: Institut für Diskrete Mathematik und Geometrie, TU Wien. Number Theory; Combinatorial Enumeration and Analysis of Algorithms; Stochastic Processes in Combinatorial Structures. Publications, teaching. |
| Dujella, Andrej: University of Zagreb, Croatia. Page on Diophantine m-tuples; Tables of high-rank elliptic curves; Link to mathematical departments and number theory groups and seminars; Information for students on courses in number theory and cryptography. |
| Duke, William: University of California Los Angeles. Number theory and automorphic forms. Publications. |
| Dummigan, Neil: University of Sheffield. Arithmetical algebraic geometry. Publications. |
| Duquesne, Sylvain: Université Montpellier II. Arithmetic and algorithmic number theory and applications in cryptography; arithmetic of curves of genus 2 or higher. Publications, software. |
Classical
