During the last few years I have been lucky enough to collaborate with the following colleagues and friends:

 

Mark Ainsworth (Brown, USA)

Alejandro Allendes (UTFSM, Chile)

Rodolfo Araya (Concepcion, Chile)

Lyonell Boulton (Heriot-Watt, Scotland)

Nabile Boussaid (Besancon, France)

Erik Burman (UCL, UK)

Ernesto Castillo (USACH, Chile)

Johnny Guzman (Brown, USA)

Fabrice Jaillet (Lyon 1, France)

Volker John (WIAS Berlin, Germany)

Fotini Karakatsani (Chester, UK)

Petr Knobloch (Charles University Prague, Czech Republic)

Diego Paredes (Concepcion, Chile)

Frédéric Valentin (LNCC, Brazil)

Andreas Wachtel (ITAM, Mexico)