Bristol Mathematics 
ComputeL  Events  Heilbronn seminar 
Linfoot seminar 
A & G seminar 
Representation theory 
Tim Dokchitser
Royal Society University Research Fellow
Department of Mathematics
Office: 2.7 Howard House 

Most of my work concerns elliptic curves and the "standard conjectures" for Lfunctions associated to arithmetic varieties. For my algorithms to compute special values of these Lfunctions see ComputeL (Paribased), Magma (starting from V2.12, July 2005, see Lfunctions and Artin Representations), William Stein's SAGE, and LMFDB/Artin representations. I am an editor of the Glasgow Mathematical Journal and of the International Journal of Number Theory (IJNT).
Recent publications/preprints:
(arxiv)
Rational representations and permutation representations of finite groups,
with A. Bartel, May 2014
(arxiv)
A positive proportion of hyperelliptic curves have odd/even 2Selmer rank, with V. Dokchitser,
appendix to M. Bhargava, B. H. Gross, X. Wang "Pencils of quadrics and the arithmetic of
hyperelliptic curves", October 2013
(arxiv) Euler factors determine local Weil
representations, with V. Dokchitser, to appear in Crelle (abs)
(arxiv)
Growth of Ш in towers for isogenous curves, with V. Dokchitser, January 2013
(arxiv)
A remark on Tate's algorithm and Kodaira types, with V. Dokchitser, Acta
Arith. 160 (2013), 95100 (abs)
(arxiv)
Local invariants of isogenous elliptic curves, with V. Dokchitser, August 2012, to appear in
Trans. Amer. Math. Soc.
(journal)
(arxiv)
Noncommutative Iwasawa theory for modular forms,
with J. Coates, Z. Liang, W. Stein and R. Sujatha,
Proc. London Math. Soc. 107(3), 2013, 481516
(abs,
pdf)
(arxiv) Brauer relations in
finite groups II  quasielementary groups of order p^{a}q, with
A. Bartel, to appear in J. Group Theory
(abs)
(arxiv)
Surjectivity of mod 2^{n} representations of elliptic curves, with V. Dokchitser,
Math. Z., Vol. 272, Issue 34 (2012), 961964
(abs,
pdf)
(arxiv) Brauer relations in finite groups,
with A. Bartel, March 2011, to appear in J. Eur. Math. Soc.
(arxiv) Identifying Frobenius
elements in Galois groups, with V. Dokchitser, Algebra and Number Theory 7 (2013), no. 6, 13251352
(abs)
(arxiv) Notes on the parity conjecture, September 2010,
CRM Barcelona Advanced Courses in Mathematics
"Elliptic Curves, Hilbert Modular Forms and Galois Deformations", Birkhauser, 2013
(publisher,
amazon)
(arxiv)
Solomon's induction in quasielementary groups, J. Group Theory 14 (2011), 4951
(abs)
(arxiv)
A note on the MordellWeil rank modulo n, with V. Dokchitser, J. Number Theory 131 (2011), 18331839
(abs)
(arxiv) Root numbers and parity
of ranks of elliptic curves, with V. Dokchitser,
Crelle, Volume 2011, Number 658, 3964
(abs)
(arxiv) A note on Larsen's conjecture and ranks of elliptic curves,
with V. Dokchitser, Bull. London Math. Soc. 41 no. 6 (2009), 10021008
(abs,
pdf)
(arxiv) Elliptic curves with all quadratic twists of positive rank, with V. Dokchitser, Acta Arith. 137 (2009), 193197
(abs)
(arxiv) Regulator constants and the parity conjecture, with V. Dokchitser, Invent. Math. 178, no. 1 (2009), 2371
(abs, pdf)
[Regulator constants  grouptheoretic version]
(arxiv) Quotients of functors of Artin rings,
Proc. Cam. Phil. Soc. 146 (2009), 531534
(abs,
pdf)
(arxiv) Selfduality of Selmer groups, with V. Dokchitser,
Proc. Cam. Phil. Soc. 146 (2009), 257267 (pdf)
(arxiv) On the BirchSwinnertonDyer quotients modulo squares,
with V. Dokchitser, Annals of Math. 172 no. 1 (2010), 567596
(abs,
pdf)
[final version (Apr 2007) with a proof of the Parity Conjecture for Selmer ranks over Q]
(arxiv) Root numbers of elliptic curves in residue characteristic 2, with V.
Dokchitser,
Bull. London Math. Soc. 40 (2008), 516524
(abs, pdf)
(arxiv) Parity of ranks for elliptic curves with a cyclic isogeny, with V. Dokchitser, J. Number Theory 128 (2008), 662679
(pdf)
(arxiv) Ranks of elliptic curves in cubic extensions,
Acta Arith. 126 (2007), 357360 (abs)
(arxiv) Computations in noncommutative Iwasawa theory, with V. Dokchitser
and appendix by J. Coates and R. Sujatha, Proc. London Math. Soc. (3) 94 (2006), 211272
(abs, pdf)
(arxiv) Numerical verification of Beilinson's conjecture for K2 of hyperelliptic curves,
with R. de Jeu and D. Zagier
Compositio Math. 142, Issue 02 (2006), 339373
(pdf)
(arxiv) LLL & ABC, J. Number Theory 107, No.1 (2004), 161167
(pdf)
for additional algebraic ABC examples see
ABC conjecture home page
(arxiv)
Computing special values of motivic Lfunctions, Exper. Math. 13, No.2 (2004), 137149
(pdf)
My Ph.D. thesis (2000,
University of Utrecht, The Netherlands) is
``Deformations of pdivisible groups and pdescent on elliptic curves'' This is a link to the
thesis, and on the right is
a link to the genealogy tree 

British Mathematical Colloquium
Bristol, March 2124, 2016
Elliptic curves, modular forms and Iwasawa theory
Conference in honour of the 70th birthday of John Coates, Cambridge, March 2527, 2015
2nd EU/US Summer School and Workshop on Automorphic Forms and Related Topics
Bristol, June 30July 14, 2014 
Lfunctions course lecture notes (3 lectures)
Average ranks of elliptic curves (after Bhargava and Shankar)
Short lecture course in Poznan, May 2014,
lecture notes by Zędrzej Garnek
LMS Regional meeting
"Arithmetic of
Lfunctions", Bristol, 13 October, 2012
"Selmer Groups, Descent and Rank Distributions",
Warwick, 2428 September, 2012
workshop home page; part of the
EPSRC Warwick Number Theory Symposium
School and Workshop on Computational Algebra and Number Theory, Trieste, June 1829, 2012
school website
BSD Summer school, Sardinia, June 26July 3, 2011
summer school website;
notes from all 3 courses by
Jim Brown.
BSD Conference, Cambridge, 46 May, 2011
program, participants, talk notes
SAGE Days 22: Computing with elliptic curves, MSRI Berkeley, June 2010
program and videos
BirchSwinnertonDyer and Parity (Short course in CRM Barcelona, December 2009)
Course notes
and
references
Potential Modularity Day, 30 October 2009
program and videos
Alex Bartel  Julio Brau  Vladimir Dokchitser  Adam Morgan  Rachel Newton 