Dilip Raghavan

Office location: S17-07-15

Mailing Address:
Department of Mathematics
National University of Singapore
10 Lower Kent Ridge Road
Singapore, 119076
Email Addresses:


Research interests

Mathematical Logic, Set Theory, Infinitary Ramsey Theory, and General Topology.

Curriculum Vitae


  1. (with K. Kunen) Gregory Trees, the Continuum, and Martin's Axiom, J. Symbolic Logic, vol. 74 (2009), no. 2, 712--720.
  2. Maximal almost disjoint families of functions, Fund. Math., vol. 204 (2009), no. 3, 241--282.
  3. There is a Van Douwen mad family, Trans. Amer. Math. Soc., vol. 362 (2010), no. 11, 5879--5891.
  4. Almost disjoint families and diagonalizations of length continuum, Bull. Symbolic Logic, vol. 16 (2010), no. 2, 240--260.
  5. A model with no strongly separable almost disjoint families, Israel J. Math., vol. 189 (2012), no. 1, 39--53.
  6. (with J. Steprāns) On weakly tight families, Canad. J. Math., vol. 64 (2012), no. 6, 1378--1394.
  7. (with S. Todorcevic) Cofinal types of ultrafilters, Ann. Pure Appl. Logic, vol. 163 (2012), no. 3, 185--199.
  8. (with S. Shelah) Comparing the closed almost disjointness and dominating numbers, Fund. Math., vol. 217 (2012), no. 1, 73--81.
  9. P-ideal dichotomy and weak squares, J. Symbolic Logic, vol. 78 (2013), no. 1, 157--167.
  10. (with T. Yorioka) Suslin lattices, Order, vol. 31 (2014), no. 1, 55--79.
  11. (with H. Mildenberger and J. Steprāns) Splitting families and complete separability, Canad. Math. Bull., vol. 57 (2014), no. 1, 119--124.
  12. (with J. Brendle) Bounding, splitting, and almost disjointness, Ann. Pure Appl. Logic, vol. 165 (2014), no. 2, 631--651.
  13. (with S. Todorcevic) Combinatorial dichotomies and cardinal invariants, Math. Res. Lett., vol. 21 (2014), no. 2, 379--401.
  14. (with A. Blass and N. Dobrinen) The next best thing to a P-point, J. Symbolic Logic, vol. 80 (2015), no. 3, 866--900.
  15. (with S. Shelah) On embedding certain partial orders into the P-points under RK and Tukey reducibility, Trans. Amer. Math. Soc., vol. 369 (2017), no. 6, 4433--4455.
  16. (with S. Shelah) Two inequalities between cardinal invariants, Fund. Math., vol. 237 (2017), no. 2, 187--200.
  17. (with P. B. Larson) Real games and strategically selective coideals, in Sets and computations, Lect. Notes Ser. Inst. Math. Sci. Natl. Univ. Singap., vol. 33 (2017), pp. 45--54.
  18. (with R. Hölzl, F. Stephan, and J. Zhang) Weakly represented families in reverse mathematics, in Computability and complexity, Lecture Notes in Comput. Sci., vol. 10010 (2017), Springer, Cham., pp. 160--187.
  19. (with S. Todorcevic) Suslin trees, the bounding number, and partition relations, Israel J. Math., vol. 225 (2018), no. 2, 771--796.
  20. (with B. Kuzeljevic) A long chain of P-points, J. Math. Log., vol. 18 (2018), no. 1, 1850004, 38 pp.
  21. (with S. Shelah) Two results on cardinal invariants at uncountable cardinals, in Proceedings of the 14th and 15th Asian Logic Conferences (Edited by: B. Kim, J. Brendle, G. Lee, F. Liu, R. Ramanujam, S. M. Srivastava, A. Tsuboi, and L. Yu), World Scientific Publishing Co. Pte. Ltd., Hackensack, NJ (2019), pp. 129--138.
  22. (with J. Verner) Chains of P-points, Canad. Math. Bull., vol. 62 (2019), no. 4, 856--868.
  23. (with S. Shelah) A small ultrafilter number at smaller cardinals, Arch. Math. Logic, vol. 59 (2020), no. 3--4, 325--334.
  24. The density zero ideal and the splitting number, Ann. Pure Appl. Logic, vol. 171 (2020), no. 7, 102807, 15pp.
  25. (with K. Higuchi, S. Lempp, and F. Stephan) On the order dimension of locally countable partial orderings, Proc. Amer. Math. Soc., vol. 148 (2020), no. 7, 2823--2833.
  26. (with A. Kumar) Separating families and order dimension of Turing degrees, Ann. Pure Appl. Logic (special issue marking the 50th Anniversary of the Toronto Set Theory Seminar), to appear.
  27. (with S. Todorcevic) Proof of a conjecture of Galvin, Forum of Mathematics, Pi, to appear.
  28. (with R. Johnston) Complexity of index sets of descriptive set-theoretic notions, submitted.
  29. (with J. Brendle, O. Guzmán, and M. Hrušák) Combinatorial properties of MAD families, in preparation.
  30. (with J. Steprāns) The almost disjointness number in higher dimensions, in preparation.
  31. (with S. Shelah) On the reaping number at the first Mahlo cardinal, in preparation.
  32. (with S. Todorcevic) Galvin’s problem in higher dimensions, in preparation.
  33. (with S. Shelah) Boolean ultrapowers and iterated forcing, in preparation.
  34. (with B. Kuzeljevic and J. Verner) Lower and upper bounds of sets of P-points, in preparation.

Upcoming and Recent Talks


Fall 2020

Spring 2021