Office: Weber 205B
Phone: (970) 491-6716
Website: http://www.math.colostate.edu/~achter/
About
Number Theory, Arithmetic Geometry, Mathematical Ecology and Evolution
Publications
- A functorial approach to regular homomorphisms Algebraic Geometry, 1, 2023.
- A complete answer to Albanese base change for incomplete varieties Annales Henri Lebesgue.
- Counting abelian varieties over finite fields via Frobenius densities Algebra and Number Theory.
- On the image of the second l-adic Bloch map Birkhauser, 2021.
- The Walker Abel--Jacobi map descends Mathematische Zeitschrift, 2021.
- Distinguished models of intermediate Jacobians Journal of the Insitute of Mathematics of Jussieu, 3, 2020.
- Arithmetic occult periods Algebraic Geometry, 5, 2020.
- Decomposition of the diagonal, intermediate Jacobians, and universal codimension-2 cycles in positive characteristic Asterisque.
- Hasse--Witt and Cartier--Manin matrices: A warning and a request American Mathematical Society, 2019.
- Parameter spaces for algebraic equivalence International Mathematics Research Notices, 6, 2019.
- Normal functions for algebraically trivial cycles are algebraic for arithmetic reasons Forum Math Sigma, e36, 2019.
- Derived equivalent threefolds, algebraic representatives, and the coniveau filtration Mathematical Proceedings of the Cambridge Philosophical Society, 1, 2019.
- Appendix to Derived equivalence, Albanese varieties, and the zeta functions of 3-dimensional varieties Proceedings of the American Mathematical Society, 2018.
- Elliptic curves, random matrices and orbital integrals Pacific J. Math., 1, 2017.
- Split abelian surfaces over finite fields and reductions of genus-2 curves Algebra Number Theory, 1, 2017.
- On descending cohomology geometrically Compositio Mathematica, 7, 2017.
- The distribution of torsion subschemes of abelian varieties J. Inst. Math. Jussieu, 4, 2016.
- A heuristic for the distribution of point counts for random curves over finite fields Philos. Trans. Roy. Soc. A, 2040, 2015.
- A note on L-packets and abelian varieties over local fields Pacific J. Math., 2, 2015.
- Local heuristics and an exact formula for abelian surfaces over finite fields Canad. Math. Bull., 4, 2015.
- Superspecial rank of supersingular abelian varieties and Jacobians J. Théor. Nombres Bordeaux, 3, 2015.
- Arithmetic Torelli maps for cubic surfaces and threefolds Trans. Amer. Math. Soc., 11, 2014.
- Generic Newton polygons for curves of given p-rankAlgebraic curves and finite fields De Gruyter, Berlin, 2014.
- Irreducibility of Newton strata in GU(1,n-1) Shimura varieties Proc. Amer. Math. Soc. Ser. B, 2014.
- On the abelian fivefolds attached to cubic surfaces Math. Res. Lett., 5, 2013.
- Quotients of elliptic curves over finite fields Int. J. Number Theory, 6, 2013.
- Explicit bounds for split reductions of simple abelian varieties J. Théor. Nombres Bordeaux, 1, 2012.
- Using network properties to predict disease dynamics on human contactnetworks Proceedings of the Royal Society B – Biological Sciences, 1724, 2011.
- The p-rank strata of the moduli space of hyperelliptic curves Adv. Math., 5, 2011.
- Exceptional covers of surfaces Canad. Math. Bull., 3, 2010.
- Fiber products and class groups of hyperelliptic curves Proc. Amer. Math. Soc., 9, 2010.
- Local monodromy of p-divisible groups Trans. Amer. Math. Soc., 2, 2010.
- Split reductions of simple abelian varieties Math. Res. Lett., 2, 2009.
- Appendix to Galois theory of iterated endomorphisms, by Rafe Jones and Jeremy Rouse Proc. London Math. Soc., 3, 2009.
- Curves of given p-rank with trivial automorphism group Michigan Math. J., 3, 2008.
- Monodromy of the p-rank strata of the moduli space of curves Int. Math. Res. Not. IMRN, 15, 2008.
- On the probability of having rational l-isogenies Arch. Math. (Basel), 6, 2008.
- Results of Cohen-Lenstra type for quadratic functionfieldsComputational arithmetic geometry Amer. Math. Soc., Providence, RI, 2008.
- The integral monodromy of hyperelliptic and trielliptic curves Math. Ann., 1, 2007.
- Mixed dispersal strategies and response to disturbance Evolutionary Ecology Research, 8, 2006.
- The distribution of class groups of function fields J. Pure Appl. Algebra, 2, 2006.
- Pair statistics clarify percolation properties of spatially explicit simulations Theoretical Population Biology, 2, 2006.
- Detecting complex multiplicationComputational aspects of algebraic curves World Sci. Publ., Hackensack, NJ, 2005.
- Comment on “Families and clustering in a natural numbers network” Physical Review E, 5, 2, 2004.
- Hilbert-Siegel moduli spaces in positive characteristic Rocky Mountain J. Math., 1, 2003.
- Notes on an analogue of the Fontaine-Mazur conjecture J. Théor. Nombres Bordeaux, 3, 2003.
- Isogeny classes of Hilbert-Blumenthal abelian varieties over finite fields J. Number Theory, 2, 2002.