Claudio Teitelboim Weitzman ( born in April 15 , 1947 ) is a Chilean theoretical physicist . Till 2005 his name was Claudio Bunster Weitzman .
Claudio Bunster Weitzman ( born April 15 , 1947 ) is a Chilean theoretical physicist . Until 2005 his name was Claudio Teitelboim Weitzman .