Adam Sheffer's Home Page

Adam Sheffer

California Institute of Technology (Caltech),
Department of Mathematics,
276 Sloane.

Phone: 626-395-4347,
Email: adamsh -at-

(Picture by Dawn K Chase)


Check out my blog focusing on combinatorial geometry.

I am a Bateman Research Instructor, working with Nets Katz. Before that, I did my Ph.D. in Tel Aviv University under the supervision of Micha Sharir.

Research related pages:

Currently Teaching (fall 14):


  1. J. Fox, J. Pach, A. Sheffer, A. Suk, and J. Zahl,
    A semi-algebraic version of Zarankiewicz's problem,

  2. A. Sheffer, J. Zahl, and F. de Zeeuw,
    Few distinct distances implies no heavy lines or circles,
    Combinatorica, to appear.

  3. M. Sharir, A. Sheffer, and J. Zahl,
    Improved bounds for incidences between points and circles,
    Combinat. Probab. Comput., to appear.
    (also in Proc. 29th ACM Symp. on Computational Geometry (SoCG 2013), 97--106.)

  4. J. Cilleruelo, M. Sharir, and A. Sheffer,
    A note on distinct distances in rectangular lattices,

  5. A. Basit and A. Sheffer,
    Incidences with k-non-degenerate sets and their applications,

  6. V. Dujmović, P. Morin and A. Sheffer,
    Crossings in grid drawings,
    Electr. J. Comb., 21(1) (2014).

  7. M. Sharir, A. Sheffer, and J. Solymosi,
    Distinct distances on two lines,
    J. Combinat. Theory A, 120 (2013), 1732--1736.

  8. M. Sharir and A. Sheffer,
    Counting plane graphs: Cross-graph charging schemes,
    Combinat. Probab. Comput., 22 (2013), 935--954.

  9. M. Sharir, A. Sheffer, and E. Welzl,
    Counting plane graphs: Perfect matchings, spanning cycles, and Kasteleyn's technique,
    J. Combinat. Theory A 120 (2013), 777--794.
    (Also in Proc. 28th ACM Symp. on Computational Geometry (SoCG 2012), 189--198.)

  10. M. Ben-Ner, A. Schulz, and A. Sheffer,
    On numbers of pseudo-triangulations,
    Comput. Geom. Theory Appl. 46 (2013), 688--699.

  11. M. Hoffmann, A. Schulz, M. Sharir, A. Sheffer, C. D. Tóth, and E. Welzl,
    Counting plane graphs: Flippability and its applications,
    Thirty Essays on Geometric Graph Theory (J. Pach, ed.), Springer, 2013, pp. 303--326.

  12. A. Dumitrescu, A. Schulz, A. Sheffer, and Cs. D. Tóth,
    Bounds on the maximum multiplicity of some common geometric graphs,
    SIAM J. Discrete Math., 27 (2013), 802--826.

  13. M. Sharir, A. Sheffer, and E. Welzl,
    On degrees in random triangulations,
    J. Combinat. Theory A 118 (2011), 1979--1999.
    (Also in Proc. 26th ACM Symp. on Computational Geometry (SoCG 2010), 297--306.)

  14. M. Sharir and A. Sheffer,
    Counting triangulations of planar point sets ,
    Electr. J. Comb., 18(1) (2011)


  1. A. Sheffer,
    Distinct Distances: Open Problems and Current Bounds,