Diem, Claus
- University of Leipzig. Arithmetic algebraic geometry: structure and arithmetic of abelian varieties; discrete logarithm problems; the regular inverse Galois problem. Publications, thesis.
- http://www.math.uni-leipzig.de/~diem/english.html

Dasgupta, Samit
- Harvard University. Arithmetic algebraic geometry. Preprints.
- http://www.math.harvard.edu/~dasgupta/

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.
- http://www.dmg.tuwien.ac.at/drmota/

Deligne, Pierre
- Institute for Advanced Study. Publications, preprints.
- http://www.math.ias.edu/~phares/deligne/Deligne.html

Diamond, Harold G.
- University of Illinois at Urbana-Champaign. Analytic number theory, distribution of primes, arithmetic functions, sieve methods. Publications.
- http://www.math.uiuc.edu/~diamond/

Diamond, Fred
- Brandeis University. Modular forms and Galois representations. CV, publications and preprints.
- http://www.math.brandeis.edu/homepages/diamond/

Dienst, Thilo
- Universität Dortmund. Geometry of Numbers; Polytopes; Quadratic Forms; Diophantine Approximation; History of Mathematics. Publications, thesis, resources.
- http://www.matha.mathematik.uni-dortmund.de/~thilo/

Diaz y Diaz, Francisco
- Université Bordeaux I. Computations in number fields. Preprints.
- http://www.math.u-bordeaux.fr/~diaz/

Dresden, Greg
- Washington and Lee University. Mahler measure of polynomials. Publications.
- http://home.wlu.edu/~dresdeng/

Denef, Jan
- University of Leuven. Number Theory, Algebraic Geometry, Singularity Theory and Mathematical Logic. Publications, software.
- http://www.wis.kuleuven.ac.be/algebra/denef.html

Daniel, Stephan
- University of Cardiff. Analytic number theory. Publications.
- http://www.cf.ac.uk/maths/daniels1/

Damianou, Pantelis
- University of Cyprus. Lie Groups; Integrable Systems; Poisson Geometry; Number Theory. Publications, talks.
- http://www.ucy.ac.cy/~damianou/

Dokchitser, Tim
- University of Durham. Arithmetic algebraic geometry. Publications, thesis, Pari/GP software.
- http://maths.dur.ac.uk/~dma0td/

Duquesne, Sylvain
- Université Montpellier II. Arithmetic and algorithmic number theory and applications in cryptography; arithmetic of curves of genus 2 or higher. Publications, software.
- http://www.math.univ-montp2.fr/~duquesne/anglais/

Doche, Christophe
- Macquarie University, Sydney. Analytic and algorithmic number theory: Mahler measure and Lehmer's problem; Rudin-Shapiro polynomials. Publications, thesis, Pari/GP code.
- http://www.math.u-bordeaux.fr/~cdoche/indexeng.html

Dodson, Maurice
- University of York. Metrical Diophantine approximation, harmonic analysis and applications to signal processing, chaos and biology. Publications, teaching material.
- http://www-users.york.ac.uk/~mmd1/

Deanin, Alice
- Villanova University. Computational number theory and Diophantine approximation. Teaching material, resources.
- http://www19.homepage.villanova.edu/alice.deanin/

Dummigan, Neil
- University of Sheffield. Arithmetical algebraic geometry. Publications.
- http://www.shef.ac.uk/personal/n/neildummiganshomepage/

David, Chantal
- Concordia University, Montréal. Drinfeld modules, Galois representations. Publications, talks.
- http://cicma.mathstat.concordia.ca/faculty/chantal/

Dickinson, Detta
- NUI Maynooth. Measure theory and metric Diophantine approximation: Diophantine approximation on manifolds.
- http://www.maths.may.ie/staff/ddickinson/

Drinen, Michael
- Willamette University. Iwasawa theory and elliptic curves. Publications, teaching material.
- http://www.willamette.edu/~mdrinen/

Dickinson, Mark
- University of Pittsburgh. Contact, teaching information.
- http://www.pitt.edu/AFShome/d/i/dickinsm/public/html/

Doud, Darrin
- Brigham Young University. Cohomology of arithmetic groups, Galois representations. Papers, resources.
- http://www.math.byu.edu/~doud/

Darmon, Henri
- McGill University. Algebraic number theory, with a special emphasis on elliptic curves, modular forms, and their associated L-functions.
- http://www.math.mcgill.ca/~darmon/

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.
- http://www.math.hr/~duje/