Recent papers of David Harbater

(2000-present)


Fundamental groups of moduli and the Grothendieck-Teichmuller group (with L.
   Schneps), Trans. AMS, vol. 352 (2000), 3117-3148. 
   dvi file

Embedding problems with local conditions, Israel Journal of Mathematics,
   vol. 118 (2000), 317-355.
   dvi file of paper 
   pdf file of correction/addendum 

Valued fields and covers in characteristic p (with M. van der Put,
   and with an appendix by R. Guralnick), in "Valuation Theory and its
   Applications", Fields Institute Communications, vol.32,  
   ed. by F.-V. Kuhlmann, S. Kuhlmann and M. Marshall, 2002, pp.175-204. 
   dvi file

Generalizations of Abhyankar's Conjecture.  Appendix to Desingularization
   and modular Galois theory, by S.S. Abhyankar, in "Arithmetic 
   Fundamental Groups and Noncommutative Algebra" (M.Fried, ed.), 
   AMS, PSPUM vol.70, 2002, pp.443-447.
   dvi file

Shafarevich conjecture.  In Supplement III, Encyclopaedia of Mathematics.
   Managing Editor: M. Hazewinkel, Kluwer Academic Publishers, 2002,
   pp.360-361.
   dvi file

Abhyankar's Conjecture and embedding problems, Crelle's Journal,
   vol. 559 (2003), 1-24.
   dvi file
   (Also see related correction/addendum to 2000 Is.J. paper.)

Abhyankar's local conjecture on fundamental groups (with K. Stevenson),
   in "Algebra, Arithmetic and Geometry with Application" (Abhyankar 70th 
   birthday conference proceedings, C.Christensen et al., eds.), 
   Springer-Verlag, 2003, pp. 473-485.
   dvi file

Patching and Galois theory.  In "Galois Groups and Fundamental Groups" 
   (L. Schneps, ed.), MSRI Publications series, vol.41,
   Cambridge University Press, 2003, pp.313-424.
   Long pdf file of the whole paper;
   or two shorter pdf files: part 1 and part 2

Local Galois theory in dimension two (with K. Stevenson), Advances in 
   Math. (special issue in honor of M. Artin's 70th birthday), 
   vol. 198 (2005), 623-653.
   pdf file
   pdf file of 2nd edition (2009) for semi-free groups

Correction and addendum to "Embedding problems with local conditions",
   Israel Journal of Mathematics, vol. 162 (2007), 373-379.  
   pdf file

On function fields with free absolute Galois groups, Crelle's Journal, 
   vol. 632 (2009), 85-103.  DOI: 10.1515/CRELLE.2009.051.
   pdf file

Oort groups and lifting problems (with T. Chinburg and R. Guralnick).
   Compositio Mathematica, vol. 114 (2008), 849-866. 
   pdf file 

Patching over fields (with J. Hartmann), Israel Journal of Mathematics,
   vol. 176 (2010), 61-107.  DOI 10.1007/s11856-010-0021-1.
   Published on-line June, 2010 at www.springerlink.com. 
   pdf file of the preprint

Applications of patching to quadratic forms and central simple algebras
   (with J. Hartmann and D. Krashen),  Inventiones Mathematicae, 
   vol. 178 (2009), 231-263.  DOI 10.1007/s00222-009-0195-5.  
   The original on-line publication is available at www.springerlink.com.
   pdf file of the preprint

Permanence criteria for semi-free profinite groups (with L. Bary-Soroker 
   and D. Haran).  Mathematische Annalen, vol. 348, no. 3 (2010), 
   539-563.  DOI 10.1007/s00208-010-0484-8. Published on-line Feb., 2010, 
   at www.springerlink.com
   pdf file

The local lifting problem for actions of finite groups on curves (with 
   T. Chinburg and R. Guralnick).  Annales scientifiques de l'ENS, 
   vol. 44, no. 4 (2011), 537-605.
   pdf file

Patching subfields of division algebras (with J. Hartmann and D. Krashen).  
   Transactions of the AMS, vol. 363, no. 6 (2011), 3335-3349.
   pdf file

Embedding problems and open subgroups (with K. Stevenson).
   Proceedings of the AMS, vol. 139, no. 4 (2011), 1141-1154.
   pdf file
   
Local-global principles for torsors over arithmetic curves (with
   J. Hartmann and D. Krashen).  2011 preprint.  
   pdf file
   
Weierstrass preparation and algebraic invariants (with
   J. Hartmann and D. Krashen).  2011 preprint.  
   pdf file
   
Division algebras and patching (with J. Hartmann).  Lecture notes for
   the 2012 Arizona Winter School.  2012 manuscript.
   pdf file
   

Earlier papers.

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