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Travel

Upcoming

Due to a high workload and large volume of requests, I am currently declining almost all future invitations to travel.

2026Feb 21: Princeton
May 11–15: Providence
Jun 23–24: DC
Jun 28 – Jul 3: Montreal (very tentative)
Jun 29: UC Riverside
Jul 20–21: Washington DC
Jul 23–30: Philadelphia
Aug 8: Stanford
Aug 28–30: Seattle
Oct 1–2: NY
Oct 9: Caltech
Nov 5–7: San Francisco
Nov 15–16: New York
2027Winter quarter: UK (very tentative)
Apr 12: York Town
May 6: New York (tentative)

Past trips (374)

2025Feb 17–20: New York
Mar 1: SLMath
Jun 9–13: Cambridge
Jun 22–27: Warsaw
July 12–20: Sunshine Coast
Aug 6–9: Sacramento
Sep 10–12: Vassar
Sep 15–19: Providence
2024Jan 3–6: San Francisco
Apr 8–12: Cambridge
Apr 15–18: Stanford
May 13–17: AIM
Jun 3–7: IAS
Jun 10–12: London
July 15–21: London, Bath
Jul 22–26: Edinburgh
Sep 15–21: Barcelona
2023Jan 3–Mar 31: IAS
Feb 13–17: IPAM
Mar 20–24: Paris
Apr 13: SLMath
June 15: UVa
June 25–July 10: vacation
July 10–14: Oxford
July 21–22: EPFL
July 31: Seoul
Aug 7–11: Poland
Nov 29: NYC
2022Mar 15: Harvey Mudd
Jun 20–26: Cambridge UK
Jun 27–Jul 1: Edinburgh
Jul 2–5: Helsinki
Jul 28–29: Washington DC
Sep 5–9: Montreal
Nov 12–13: CSUN
2021Jan 26 (Sofia) – remote:
Apr 8 (Stanford) – remote:
Apr 9 (Beirut) – remote:
Apr 12–23 (MSRI) – remote:
June 29–30: Los Angeles
July 1–14: Bonn
Sep 9 (Montreal) – remote:
Sep 20–24: RISM
Sep 27–30 (Sydney) – remote:
Oct 30: Penn state
Nov 24 (Budapest) – remote:
2020Jan 18: Denver
Jan 22–23: Irvine
Feb 10–14: Basel
Feb 19–20: Simons Institute
Mar 14–15: U. Virginia
Mar 16–17: Austin
Oct 1: Calgary, remote
Oct 16: Dublin, remote
2019Jan 19: Baltimore
Feb 22–24: Caltech
Mar 22: Dublin
Apr 1–3: Brown
Apr 26: NYC
May 14–16: Madison
May 31: IAS
Jul 1: New York
Jul 6–7: Paris
Sep 12: Washington DC
Sep 16: USC
Oct 19–20: Berkeley
2018Jan 9–21: Chile
Feb 17–18: New York
Mar 19–Jun 15: IPAM
Jun 2–4: Bristol
Jun 20–21: New York
Jun 22–24: Milano
Jun 25–30: Cortona
July 2–8: Budapest
Jul 10–20: Vacation
Aug 19–24: Banff
Sep 24–28: Oxford
Nov 7: San Diego
Dec 9–15: AIM
2017Jan 9–13: IPAM
Jan 17–Mar 24: MSRI
Mar 21–23: Oslo
Mar 24–27: Frankfurt
Apr 10–11: Simons Institute
May 4–5: MSRI
June 12–30: Korea
July 3–7: Park City
July 17–21: Edinburgh
July 26: NYC
Aug 14–18: AIM
Sep 4–8: Wroclaw
October 2–6: Marseilles
Oct 18–19: NY
Oct 24: Annapolis
Dec 2–4: Bay area
Dec 5: NY
2016Jan 16–22: Tel Aviv
Jan 25–29: Princeton
May 18–19: Wisconsin
May 21–24: IAS
Aug 2: NYC
Aug 8–23: Vacation
Oct 15–16: UCLA, SCAPDE
Dec 15: Lake Arrowhead
2015Feb 16–17: San Jose
March 14–23: Jerusalem
Apr 9–11: Los Angeles
Jun 1–6: Paris
Jun 7–9: FIM, Zurich
Jun 10–12: Norway
Jul 13–17: Oxford
Jul 19–25: Banff
Jul 29: New York
Aug 15–26: Vacation
Sep 28–Oct 1: Adelaide
Nov 27–28: Silicon Valley
2014Feb 3–7: MSRI
Feb 24–27: New York
Mar 10–Jun 13: IPAM
Jul 1–6: Segovia
Jul 6–13: IHES
Jul 13–19: Bonn
Jul 19–Aug 1: Vacation
Sep 7–12: Lehigh university
Sep 21–26: Oxford
Sep 29–Oct 3: Minnesota – IMA
Oct 19–20: Baltimore
Oct 22–23: Stockholm
Nov 7–8: IPAM
Nov 9–10: Silicon Valley
Nov 11–14: Yale
Nov 12: NYC
Nov 17–21: AIM
Dec 1: London
Dec 26–Jan 2: Vacation
2013Jan 7–8: San Diego
Jan 19–20: San Diego
Feb 11–15: Princeton
Feb 20–24: New York
Mar 16–18: MSRI
Jun 17–21: UCLA
Jul 1–5: Budapest
Aug 6–8: New York, MoMath lecture
Aug 10–17 (Australia) – vacation:
Aug 18–Sep 1: New Zealand
Oct 6–8: Caltech
Nov 1–2: IPAM
Nov 8–9: MSRI
Dec 1–3: Simons
2012Feb 23–25: Mumbai
Mar 11–12: Northwestern
Apr 17–20: Michigan
Apr 23–May 12: Northwestern
May 2: Princeton
May 4–6: Northwestern
May 9: MIT
May 13–16: Lund
May 17–19: Cambridge
May 20–24: Oslo
Jun 1–2: Washington DC
Jun 4–6: Yale
Jul 28: Ohio State
Aug 12–25: Vacation
Sep 27–30: Oslo
Oct 6–13: Oberwolfach
Nov 2–3: IPAM
Nov 7–9: Philadelphia
Nov 29–Dec 1: Minnesota
2011Jan 10 – Feb 19: Cambridge – Newton Institute program
Jan 19: Birmingham
Feb 1–7: Haifa
Feb 11: Edinburgh
Feb 21–Mar 18: Northwestern; see also this workshop
May 7: Newark
May 16–May 20: Princeton – Stein conference
June 27–July 1: U. Wales
Sep 22–24: Oslo
Oct 12–14: IPAM – DOD2011
Nov 4–5: IPAM
2010Feb 1–4: UCLA
Mar 6–10: Riyadh
Mar 16–18: Michigan
Mar 22–26: Minnesota
June 13–15: Austin
July 12–16: Pittsburgh
July 24–Aug 1: vacation
Aug 1–7: Budapest
Sep 16: MSRI
Oct 4–7: Stanford
Oct 9: UCLA
Nov 2–6: IPAM
Nov 13–14: SCAPDE
Dec 13–17: AIM workshop
Dec 29–Jan 3: vacation
2009Feb 9–13: IPAM – eigenfunctions workshop
Feb 17, 19: USC – Whiteman lecture
Mar 18–19: Leiden
Mar 20–27: Haifa
Apr 25–26: DC – NAS
May 4–9: Princeton
June 22–26: IHP
July 17–20: Bremen
July 26–Aug 2: Canazei – research
Aug 23 – Oct 2: Australia
Oct 10: Boston – AAAS
Nov 9–12: Oregon
Nov 13–14: IPAM – SAB
Nov 23–25: Sapporo
Dec 1–4: IPAM
Dec 11–23: Korea
Dec 19–21: Beijing
2008Jan 5–8: San Diego
Jan 12–13: San Diego
Feb 3–7: Katoomba
Feb 11–15: IPAM
Mar 14–19: DIMACS
Mar 30: Washington DC
Apr 4–9: Toronto
Apr 17: UCLA – combinatorics seminar
Apr 26: Los Angeles
May 3–7: Washington DC
May 24–26: San Jose – personal
June 9–13: Ohio – equidistribution workshop
June 23–27: Edinburgh
July 8–9: San Diego – research visit
July 13–19: Oberwolfach
Aug 21–Sep 21: MSRI
Nov 3–7: MSRI
Nov 14: IPAM – SAB
Nov 15: Irvine – JAMS
Nov 17–21: Penn State
Dec 3–6: Seville
Dec 7–9: Trondheim
Dec 18–21: vacation
2007Jan 22–26: Canberra
Feb 15: San Diego
Mar 18–19: UCLA
Apr 2–6: MIT
Apr 11–14: Leiden
Apr 26: UCLA
June 11–14: San Diego
July 9–15: London
Aug 6–9: Portland
Sep 1: San Diego
Oct 9–13: Leiden
Oct 14–Nov 2: IAS
Oct 20–22: Providence
Nov 9: San Diego
Dec 1–7: U. Washington
2006Mar 2: USC – colloquium
Mar 14: UC Santa Cruz – colloquium
Mar 24–26: Memphis
Mar 30–Apr 9: Montreal
Apr 22–25: Banff
June 1–28: Paris
June 6: ENS
June 7–14: Paris
June 15–16: Grenoble – colloquium
July 1–23: UCLA – Clay Liftoff project
July 24–Aug 4: San Diego
Aug 20–28: Madrid
Sep 22–29: Sydney
Nov 11: Princeton – JAMS
Nov 17–18: Boston
Dec 16–22: Kumbakonam
2005Jan 29–30: Princeton
Mar 15: Caltech
Mar 31 – Apr 2: Northwestern
Apr 16–17: Santa Barbara
June 13–17: New Mexico
June 20–July 15: San Diego
July 18–21: Sendai
Aug 6–9: Boston – vacation
August 22–26: Cambridge
Aug 27–Sep 9: Bristol
September 14–21: Sydney – vacation
October 1–31: IAS – visit
Oct 5: Princeton
Oct 6–8: U. Maryland – colloquium
Oct 12–14: MIT
Oct 20: Cornell – seminar
Oct 24: Princeton – seminar
Oct 28–29: Courant
Nov 7–22: Berkeley
Nov 19: Princeton – JAMS
Dec 7–2006 Feb 6: Australia – US immigration
2004Feb 26, Mar 4: San Diego
Mar 26–28: Princeton
Mar 29 – Apr 3: University of Michigan
Apr 3–8: Michigan State University
Apr 10 – June 20: Edinburgh + elsewhere in UK
June 7–11: Forges les Eaux
June 21–25: El Escorial
Sep 9–12: AIM
Dec 12–14: Stanford
2003Jan 3–5: San Diego
Apr 1,3,8,10: Caltech
Jun 23–27: Mexico
June 29–July 12: Park City
Aug 1–5: Adelaide
Nov 7: Sydney
July 13 – 2004 Jan 23: ANU
2002Jan 6–7: San Diego
Jan 14–18: Macquarie
Mar 23–26: Boston
Mar 27–Apr 2: Edinburgh
Apr 3–7: Orsay
Apr 8–10: Chicago
Apr 20–21: San Diego
Apr 25: Irvine
Apr 29: Caltech
May 1–7: Stanford
May 8–11: Missouri
June 25–29: Madison
July 1–16: Minnesota
July 17–Aug 14: Canberra
Aug 18–20: Microsoft Research
2001Mar 30–31: Kansas
Apr 5–6: Missouri
Apr 8–14: Boston
Apr 15–19: Madison
Apr 20–22: Minnesota
Apr 23–May 20: Princeton
May 10–11: U. Mass. Amherst
May 20–26: Oberwolfach
May 27–Jun 3: ETH
Jun 4–10: Goteborg
Jun 11–24: Milan
Jul 12–13: Washington DC
Jul 14–22: Caltech/UCLA
Aug 17–22: Adelaide
Sep 7–22: UCLA
Jun 25–Dec 6: ANU
2000Feb 12–13: Stanford
Feb 21–22: Caltech
Mar 24–Apr 2: Berkeley
Apr 14–16: Michigan
Apr 28–30: San Diego
May 23–28: Paris
Jun 15–21: Caltech
Jun 22–Jul 1: France
Jul 2–6: El Escorial
Jul 20: ANU
Jul – Dec: UNSW
Sep 9–24: Sendai
Sep 24 – Oct 2: Canberra
Oct 3–4: Melbourne
Dec 6–13: Stanford
Dec 14–20: Berkeley
1999Jan 6–Jan 12: Madison
Apr 1–4: Iowa
Apr 10–11: Las Vegas
Jun 18–July 1: Vacation
July 1–Dec 24: UNSW
July 11–16: Melbourne
July 17–23: ANU
Nov 6–12: ANU
Dec 24–2000 Jan 2: Vacation
1998Mar 26–28: Austin
Mar 29–31: Madison
Apr 1–3: San Diego
July 6–13: Edinburgh
July 14–23: Madrid
July 24–Aug 9: Paris
Aug 10–14: Kiel
Aug 15–27: Berlin
Sep 14–21: Chicago
Dec 3–6: Berkeley
Dec 19–1999 Jan 4: Princeton
1997July 13–18: MSRI
August 2–10: Baltimore
August 11–17: Princeton
Aug 19–Dec 10: Berkeley
Dec 21–1998 Jan 1: Vacation