Mathematicians at work

Left: 2007 with David Riley in Lecce, Italy.

Right: 2009 at the ESI, Vienna, Austria with Flavia Zapata, Theo Zapata and J-P. Serre.

Left: 2007 with Gunter Malle in Kaiserslautern, Germany.

Right: 2009, Vienna, Austria, Picknick in the Hotel with Aline Pinto, ..., Pavel Zalesskii, Flavia and Theo Zapata, Desi Kochloukova.

Left: 2010 with Pavel and Alex Zalesskii and Theo Zapata in Milano.

Right: 2011 with Pavel Shumyatsky in Milano

Left: 2015 with Shigeo Koshitani in Milano.

Right: 2016 in the dessert south of Be'er Sheva, Israel: Ido Efrat, Christian Maire and Claudio Quadrelli (my hat was even cooler ...)

Perugia, Umbria, 2016. SMI summer course .

Left: on the "piazza"

Right: at the "Lemon Spot"