These photos were taken during my visits to take part in mathematical conferences in Brazil and abroad.   Some of the photos were taken when colleagues came to visit me in Brazil.

1985-1995

1996-1996

1996-1997

1997-1997

1998-1998

1998-1998

1999-1999

1999-1999

1999-2000

2001-2001

2001-2001

2002-2002

2002-2002

2002-2002

2003-2003

2004-2004

2005-2005

2006-2006

2006-2006

2006-2006

2006-2006