Oberwolfach, Germany (1998). Conference on Modulformen (photo provided by R. Schmid).

Luminy, France (1999). Conference on Formes Automorphes, Centre International de Rencontres Mathématiques.

Hakuba, Japan (2003). Sixth Autumn Workshop of Number Theory.

Hakuba, Japan (2003). Sixth Autumn Workshop of Number Theory, Hike. Profs. Friedberg, Hironaka, Bocherer (photo by Prof. D. Soudry).

Minneapolis (2004). Number Theory Conference in Honor of Harold Stark's 65th Birthday, University of Minnesota.

Bretton Woods (2005). Bretton Woods Workshop on Multiple Dirichlet Series (photo by Dr. C. J. Mozzochi).

Philadelphia (2006). Conference on Modular Forms and Related Topics in Honor of Marvin Knopp's 73rd Birthday. Profs. Murty, Choie, Kohnen, Friedberg.

Moscow, Russia (2006). Conference on Zeta Functions, Independent University of Moscow. Profs. Friedberg and Ihara.

Seoul, South Korea (2006). KIAS-POSTECH-SNU International Number Theory Workshop.

Seoul, South Korea (2006). A meal during the KIAS-POSTECH-SNU International Number Theory Workshop.

Stanford (2006). Stanford Workshop on Multiple Dirichlet Series.

Guangzhou, China (2007). Conference on The Langlands and Geometric Langlands Program. Profs. Lapid, Gelbart, Friedberg and Liu.

Lanzhou, China (2007).  The Yellow River. Trip following conference on The Langlands and Geometric Langlands Program, Guangzhou.

Dunhuang, China (2007). Trip following conference on The Langlands and Geometric Langlands Program, Guangzhou.

Phoenix (2008). Chihuly exhibit at the Desert Botanical Garden (following a Number Theory Seminar at Arizona State University).

Near Phoenix (2008). Photo by Prof. A. Bremner.

Near Phoenix (2008). Photo by Prof. A. Bremner.

Santiago, Chile (2008). Conference on La capacidad para enseñar matemática de los futuros profesores de Enseñanza Pre-básica y Básica (K-8), Universidad de Chile.

Bonn, Germany (2009). Conference on Mock Theta Functions and Applications in Combinatorics,  Algebraic Geometry, and Mathematical Physics, Max-Planck-Institut für Mathematik.

Woods Hole Harbor (2009). Dusk.

Martha's Vineyard (2009). Lighthouse.

Banff, Canada (2010). Workshop on Whittaker Functions, Crystal Bases, and Quantum Groups, Banff International Research Station.

Hawaii (2010). At the 24th Automorphic Forms Workshop, University of Hawaii at Manoa. Photo by Prof. A. Folsom.

Taiwan (2010). Profs. Friedberg and Hoffstein. Weekend trip following the International Conference on Automorphic Forms and Related Topics, National Center for Theoretical Sciences. Photo by A. Hoffstein.

Henan Province, China (2012). Profs. Zhang, Jiang and Friedberg. Photo by Prof. Chufeng Nien.

Banff, Canada (2013). Workshop on Whittaker Functions: Number Theory, Geometry and Physics, Banff International Research Station.

Luminy, France (2015). From the viewpoint near the CIRM.

Luminy, France (2015). On a hike after the Conference on Automorphic Forms, CIRM.

Singapore (2015). National University of Singapore, view from the math building.

Singapore (2015). Shop on Orchard Road. Photo by Prof. Lei Zhang.

Rio de Janeiro, Brazil (2015). At the Chinese Pagoda near IMPA, International Conference on Number Theory and Physics.

Washington DC (2016). Meeting of the US National Commission on Mathematics Instruction.

Pune, India (2016). Conference on Automorphic Forms on Metaplectic Groups and Related Topics. Photo by Makarand Sarnobat.

Pune, India (2016).  With Profs. Takeda and Zhu at the Kalkar Museum. Photo by Prof. Loke Hung Yean.

Harbin, China (2017). With Prof. Tonghai Yang. Excursion during the POSTECH-HIT Number Theory Workshop (2017). Photo by Haihua Zhang.

Zürich, Switzerland (2018). Automorphic Forms on Reductive Groups and Their Covers: A Conference in Honour of Solomon Friedberg, ETH.  With my special thanks to the organizers!

Elmau, Germany (2018). Simons Symposium on Relative Trace Formulas.

Lamma Island, Hong Kong (2018). 2018 HKU Number Theory Days, Profs. Zhang, Friedberg, Kane and Athreya.

Singapore (2019). With Prof. Erez Lapid during the conference On the Langlands Program: Endoscopy and Beyond, IMS.

Penyengat Island, Indonesia (2019). With Profs. Emory, Johnstone, Wu, Karasiewicz, and Mondal on. Day trip from Singapore during the conference On the Langlands Program: Endoscopy and Beyond, IMS.

Pohang, South Korea (2019).  Conference on the Langlands Conjectures and L-functions, Pohang Math Institute.

Bulguksa Temple, South Korea (2019). With Profs. Lei Zhang and YoungJu Choie, excursion from the Pohang Math Institute.

Stony Brook  (March 2019), during the earlier part of the program Automorphic Structures in String Theory.

Stony Brook (April 2019), during the later part of the program Automorphic Structures in String Theory.

NYC (2019).  United Nations building, wall hanging.

NYC (2019), The Vessel, Hudson Yards.

Cambridge, UK (2022). At the University of Cambridge.  Photo by Prof. D. Gourevitch.

Cambridge, UK (2022). With Prof. Erez Lapid at Churchill College, University of Cambridge, during the program on New Connections in Number Theory and Physics (2022).

Oaxaca, Mexico  (2022). Profs. Stevens, Friedberg, Blondel and Cunningham.  Afternoon trip to Monte Albán, during the workshop Langlands Program: Number Theory and Representation Theory, Casa Matemática Oaxaca.

Naples, Italy (2023).  Profs. Bossard, Kleinschmidt, Persson and Friedberg. Trip during the conference New Connections Between Physics and Number Theory, Pollica, Italy.

Pollica, Italy (2023).  View from the conference site.

Washington DC (2024). Meeting of the US National Commission on Mathematics Instruction.