Matthew Emerton's Papers and Preprints



All links are to dvi files or to pdf files, as indicated.

The following papers are either submitted for publication, or in the process of being revised prior to being submitted. New drafts may appear from time to time.

An introduction to the categorical p-adic Langlands program   (with Toby Gee and Eugen Hellmann)
pdf

Explicit reciprocity laws and Iwasawa theory for modular forms   (with Robert Pollack and Tom Weston)
pdf

Localization of smooth p-power torsion representations of GL_2(Q_p)   (with Andrea Dotto and Toby Gee)
pdf

Moduli stacks of two-dimensional Galois representations   (with Ana Caraiani, Toby Gee, and David Savitt)
pdf

Local-global compatibility in the p-adic Langlands programme for GL_2/Q
(Draft dated March 23, 2011)
dvi pdf

On a class of coherent rings, with applications to the smooth representation theory of GL_2(Q_p) in characteristic p
(Draft dated May 19, 2008)
dvi pdf

The following papers have either appeared, or have been accepted to appear. For those papers that have appeared in print, the versions
presented here may differ slightly from the published versions. (For example, they don't always incorporate revisions made to proofs.)

Moduli stacks of etale (phi,Gamma)-modules: a survey   (with Toby Gee)
To appear in Proceedings of the International Colloquium on Arithmetic Geometry, TIFR Mumbai, Janury 6-10, 2020.
pdf

Moduli stacks of etale (phi,Gamma)-module and existence of crystalline lifts   (with Toby Gee)
Appeared in Annals of Math. Studies vol. 215, Princeton University Press, 2023.
pdf
Here is a list of errata.

Langlands reciprocity: L-functions, automorphic forms, and Diophantine equations
Appeared in The genesis of the Langlands program
(Julia Mueller, Freydoon Shahidi eds.),
London Mathematical Society Lecture Notes Series, vol. 467, 2021, 301-386.
pdf

Globally realizable components of local deformation rings   (with Frank Calegari and Toby Gee)
Appeared in J. Institut Math. Jussieu 21 (2022), 533-602.
pdf

``Scheme-theoretic images'' of certain morphisms of stacks   (with Toby Gee)
Appeared in Alg. Geom. 8 (2021), 1-132.
pdf

On the density of supercuspidal points of fixed regular weight in local deformation rings and global Hecke algebras   (with Vytas Paskunas)
Appeared in J. de l'Ecole Poly. Math. 7 (2020), 337-371.
pdf

Compatible systems of Galois representations associated to the exceptional group E_6   (with George Boxer, Frank Calegari, Brandon Levin, Keerthi Madapusi Pera, and Stefan Patrikis)
Appeared in Forum Math. Sigma 7 (2019), e4, 29 pages.
pdf

Patching and the p-adic Langlands program for GL_2(Q_p)   (with Ana Caraiani, Toby Gee, David Geraghty, Vytas Paskunas, and Sug Woo Shin)
Appeared in Comp. Math. 154 (2018), no. 3, 503-548.
dvi pdf

Explicit Serre weights for two-dimensional Galois representations   (with Frank Calegari, Toby Gee, and Lambros Mavrides)
Appeared in Comp. Math 153 (2017), no. 9, 1893-1907.
pdf

Patching and the p-adic local Langlands correspondence   (with Ana Caraiani, Toby Gee, David Geraghty, Vytas Paskunas, and Sug Woo Shin)
Appeared in Camb. J. of Math. 4 (2016), no. 2, 197-287.
dvi pdf

Homological stability for completed homology   (with Frank Calegari)
Appeared in Math. Ann. 364 (2016), no.3-4, 1025-1041.
dvi pdf

p-adic Hodge-theoretic properties of etale cohomology with mod p coefficients, and the cohomology of Shimura varieties   (with Toby Gee)
Appeared in Algebra and Number Theory 9 (2015), no. 5, 1035-1088.
dvi pdf

Lattices in the cohomology of Shimura curves   (with Toby Gee and David Savitt)
Appeared in Invent. Math. 200 (2015), no. 1, 1-96.
dvi pdf

Completed cohomology and the p-adic Langlands program
Appeared in the Proceedings of the 2014 ICM.
dvi pdf

The local Langlands correspondence for GL(n) in families   (with David Helm)
Appeared in Ann. Sci. E.N.S. (4) 47 (2014), no. 4, 655-722.
pdf

A geometric perspective on the Breuil--Mezard conjecture   (with Toby Gee)
Appeared in J. Institut Math. Jussieu 13 (2014), no. 1, 183-223.
dvi pdf

Weight cycling and Serre-type conjectures for unitary groups  (with Toby Gee and Florian Herzig)
Appeared in Duke Math. J. 162 (2013), no. 9, 1649-1722.
dvi pdf

Completed cohomology --- A survey  (with Frank Calegari)
Appeared in Nonabelian Fundamental Groups and Iwasawa Theory
(John Coates, Minhyong Kim, Florian Pop, Mohamed Saidi, Peter Schneider eds.),
London Mathematical Society Lecture Notes Series, vol. 393, 2011, 239-257.
dvi pdf

Mod-p cohomology growth in p-adic analytic towers of 3-manifolds  (with Frank Calegari)
Appeared in Groups, Geometry, and Dynamics 5 (2011), 355-366.
dvi pdf

p-adic families of modular forms [after Hida, Coleman, and Mazur]
Appeared in Seminaire Bourbaki, 2009/2010, expose 1013, Asterisque 339 (2011), 31-61.
dvi pdf

On the effaceability of certain delta-functors  (with Vytas Paskunas)
Appeared in Asterisque 331 (2010), 439--447.
dvi pdf

Ordinary parts of admissible representations of p-adic reductive groups I. Definition and first properties
(Revised version, dated January 19, 2010)
Appeared in Asterisque 331 (2010), 335--381.
dvi pdf

Ordinary parts of admissible representations of p-adic reductive groups II. Derived functors
(Revised version, dated January 19, 2010)
Appeared in Asterisque 331 (2010), 383--438.
dvi pdf

Jacquet modules of locally analytic representations of p-adic reductive groups II. The relation to parabolic induction
(Draft dated October 10, 2007)
To appear in J. Institut Math. Jussieu.
dvi pdf

Bounds for multiplicities of unitary representations of cohomological type in spaces of cusp forms   (with Frank Calegari)
Appeared in Ann. of Math. 170 (2009), 1437--1446
dvi pdf

Representations p-adique ordinaires de GL_2(Q_p) et compatibilite local-global   (with Christophe Breuil)
Appeared in Asterisque 331 (2010), 235--295.
dvi pdf

Elliptic curves of odd modular degree   (with Frank Calegari)
Appeared in Israel J. Math. 169 (2009), 417-444.
dvi pdf

Locally analytic representation theory of p-adic reductive groups: A summary of some recent developments
(Revised version, dated March 16, 2007)
Appeared in L-functions and Galois representations (D. Burns, K. Buzzard and J. Nekovar, eds.),
London Mathematical Society Lecture Note Series, vol. 320, 2007, 407-437.
dvi pdf

A local-global compatibility conjecture in the p-adic Langlands programme for GL_2/Q
Appeared in Pure and Applied Math. Quarterly 2 (2006), no. 2, 279-393.
(special issue in honour of John Coates' 60th birthday).
dvi pdf

Variation of Iwasawa invariants in Hida families   (with Robert Pollack and Tom Weston)
Appeared in Invent. Math. 163 (2006), no. 3, 523-580.
(The official electronic version can be found here on the SpringerLink website.)
dvi pdf

Jacquet modules of locally analytic representations of p-adic reductive groups I. Construction and first properties
Appeared in Ann. Sci. E.N.S. 39 (2006), no. 5, 775-839.
dvi pdf

p-adic L-functions and unitary completions of representations of p-adic reductive groups
Appeared in Duke Math. J. 130 (2005), no. 2, 353-392.
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On the interpolation of systems of eigenvalues attached to automorphic Hecke eigenforms
Appeared in Invent. Math. 164 (2006), no. 1, 1-84.
(The official electronic version can be found here on the SpringerLink website.)
dvi pdf

Locally analytic vectors in representations of locally p-adic analytic groups
(Revised version, dated September 19, 2011)
To appear in Memoirs of the AMS.
dvi pdf

On the ramification of Hecke algebras at Eisenstein primes   (with Frank Calegari)
Appeared in Invent. Math. 160 (2005), no. 1, 97-144.
(The official electronic version can be found here on the SpringerLink website.)
dvi pdf

A geometric Jacquet functor   (with David Nadler and Kari Vilonen)
Appeared in Duke Math. J. 125 (2004), no. 2, 267-278.
dvi pdf

An introduction to the Riemann-Hilbert correspondence for unit F-crystals   (with Mark Kisin)
Appeared in Geometric Aspects of Dwork Theory (A. Adolphson etc. eds.), Vol. II, Walter de Gruyter, 2004, 677-700.
dvi pdf

The Riemann-Hilbert correspondence for unit F-crystals   (with Mark Kisin)
Appeared in Asterisque 293 (2004).
dvi pdf

The Hecke algebra has large index   (with Frank Calegari)
Appeared in Math. Research Letters 11 (2004), no. 1, 125-137.
dvi pdf

Optimal quotients of modular Jacobians
Appeared in Math. Ann. 327 (2003), no. 3, 429-458.
(The official electronic version can be found here on the SpringerLink website.)
dvi pdf

Supersingular elliptic curves, theta series and weight two modular forms
Appeared in J. Amer. Math. Soc. 15 (2002), no. 3, 671-714.
dvi pdf

Unit L-functions and a conjecture of Katz   (with Mark Kisin)
Appeared in Ann. of Math. 153 (2001), no. 2, 329-354.
dvi pdf

The Eisenstein ideal in Hida's ordinary Hecke algebra
Appeared in IMRN 1999, No. 15, 793-802.
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A new proof of a theorem of Hida
Appeared in IMRN 1999, No. 9, 453-472.
dvi pdf

The following papers are ones which I do not intend to publish at the present time.

Formal algebraic stacks
pdf

On the vanishing of certain extensions of admissible smooth representations in characteristic p
pdf
This very short note relates Gelfand--Kirillov dimensions, duality, and extensions of representations.

Deformations of Galois representations and applications --- talk at the IHP conference on the occassion of the Galois bicentennial
pdf
(These are more-or-less the notes of a talk I gave at the indicated conference. One thing I learned at the conference, from the talk of Bost,
and that I mentioned in my talk, but which is not included in the notes, is that some of the Galois theoretic aspects of the Taylor--Wiles
auxiliary primes were already noted in a letter of Jacobi in the 19th century. I find this thread, and other threads, of continuity in the
development of our subject very pleasing!)

A p-adic variational Hodge conjecture and modular forms with complex multiplication
dvi pdf

Extensions of crystalline representations   (with Mark Kisin)
(Note that this paper is unfinished, and will likely remain so in the future. The fourth section in particular requires some corrections.)
dvi

The following report gives an account of research undertaken by a working group at the American Insitute of Mathematics investigating the mod p local Langlands correspondence, during the workshop ``p-adic representations, modularity, and beyond'', held at AIM in February, 2006
pdf

In 1999 the IAS/Park City Mathematics Institute was devoted to arithmetic geometry.
I gave an informal lecture there introducing the subject of p-adic modular forms, a
write-up of which has been incorporated as an appendix to Fernando Gouvea's lecture
notes from the Insititute. Here is an early draft of this appendix (it is missing figures
and some corrections).
dvi
The final version is for sale here .

Here is a gzipped tar file which contains the various chapters (in postscript format)
of my Harvard doctoral thesis "2-adic modular forms of minimal slope".
emerton-thesis.tar.gz

If you are unsure what to do with a gzipped tar file, here are the directions.