# Ari Shnidman

I am a senior lecturer (tenure-track) in the math department at the Hebrew University of Jerusalem.

For Fall and Winter 2022-2023, I'll be on sabbatical, visiting Dartmouth College.

##
Address:

Einstein Institute of Mathematics

Hebrew University of Jerusalem

**Office**: Manchester 104

**Email**: ari.shnidman (at) gmail.com

##
Research

My research interests are in number theory, especially arithmetic geometry, automorphic forms, and arithmetic statistics.
##
Papers

Arbitrarily large *p*-torsion in Tate-Shafarevich groups, with E.V. Flynn, *submitted*.

Integers expressible as the sum of two rational cubes, with L. Alpöge and M. Bhargava, *submitted*. (Related slides and a popular article.)

Experiments with Ceresa classes of cyclic Fermat quotients, with D. Lilienfeldt, *Proceedings of the AMS*.

Rank growth of elliptic curves over N-th root extensions, with A. Weiss, to appear in * Transactions of the AMS*.

Sandpile groups of supersingular isogeny graphs, with N. Munier, to appear in *Journal de Theorie des Nombres de Bordeaux*.

Elements of prime order in Tate-Shafarevich groups of abelian varieties over ℚ , with A. Weiss, *Forum of Mathematics, Sigma*.

Ranks of abelian varieties in cyclotomic twist families, with A. Weiss, * submitted *.

A positive proportion of quartic fields are not monogenic yet have no local obstruction to being so , with L. Alpöge and M. Bhargava, to appear in *Mathematische Annalen*.

Manin-Drinfeld cycles and derivatives of *L*-functions, to appear in *JEMS*.

Genus two curves with full √ 3 level structure, with N. Bruin and E.V. Flynn, to appear in *Selecta Mathematica*. (sage code)

A positive proportion of cubic fields are not monogenic yet have no local obstruction to being so, with L. Alpöge and M. Bhargava, *submitted*.

Elements of given order in Tate-Shafarevich groups of abelian varieties in quadratic twist families, with M. Bhargava, Z. Klagsbrun, and R. Lemke Oliver, *Algebra & Number Theory*.

Quadratic twists of abelian varieties with real multiplication, *IMRN*.

A Gross-Kohnen-Zagier formula for Heegner-Drinfeld cycles, with B. Howard, *Advances in Mathematics*.

The average size of the 3-isogeny Selmer groups of elliptic curves *y*^{2} = x^{3} + k, with M. Bhargava and N. Elkies, *Journal of the LMS*.

Grothendieck groups of categories of abelian varieties, *European Journal of Mathematics*.

Three-isogeny selmer groups and ranks of abelian varieties..., with M. Bhargava, Z. Klagsbrun, and R. Lemke Oliver, *Duke Math Journal*.

Extensions of CM elliptic curves and orbit counting on the projective line, with J. Rosen, *Research in Number Theory*.

*p*-adic heights of generalized Heegner cycles, *Annales de l'Institute Fourier*.

Néron-Severi groups of product abelian surfaces, with J. Rosen.

Heights of generalized Heegner cycles, Ph.D. thesis, University of Michigan.

On the number of cubic orders of bounded discriminant having automorphism group C3, and related problems, with M. Bhargava,* Algebra & Number Theory*.

Grand orbits of integer polynomials, with M. Zieve (appendix with B. Seward).

##
HUJI-BGU Workshop in Arithmetic

Upcoming:

HBWA 5, June 27, in Jerusalem.

Past:
HUJI-BGU 1 -- Tate modules of elliptic curves and abelian varieties

HUJI-BGU 2 -- L-functions for GL(1) and regulators

HUJI-BGU 3 -- Arithmetic geometery of locally symmetric spaces

HUJI-BGU 4 -- Research talks

##
Seminars:

Fundamental Lemmas and Fourier Transform

Number Theory and Algebraic Geometry Lunch Seminar

##
Funding: