On Sunday, May 23rd 2004, David and Sue flew to São Paulo with Victor Giraldo for David to present a seminar on The Three Worlds of Mathematics. They began with a celebration at the Restaurant Jardim di Napoli with the Math Educators from São Paulo.

Prof Ubi D’Ambrosio, his wife Maria Jose and Lulu Healy prepare for the meal.	‘It was that big.’ said Sue. Victor is not amused.
‘It couldn't possibly be!’	‘Don’t make me laugh!’
Rosana Nogueira de Lima smiles at the thought.
‘A toast!’ proposed by Cristina Maranhao and David, looking suitably smug.	Celina gets in on the act.
Cristina, David, Sonia Igliori and Ubi pose for a picture.	Lulu, David, Cristina and Janete Bolite Frant.
David and Ana Paula Jahn.	Ana Paula, Celina, Ubi and Maria Jose.
PONTIFÍCIA UNIVERSIDADE CATÓLICA DE SÃO PAULO Centro das Ciências Exatas e Tecnologias Programa de Estudos Pós-Graduados em Educação Matemática C  O  N  F  E  R  Ê  N  C  I  A  " Desenvolvimento Cognitivo através dos Três Mundos da Matemática" Prof. Dr. DAVID TALL Professor in Mathematical Thinking Mathematics Education Research Centre University of Warwick - Reino Unido DIA: 24/05/2004 (segunda-feira) HORÁRIO: 14:00 hs. LOCAL: Anfiteatro - Prédio 2 - Térreo Campus Marquês de Paranaguá Rua Marquês de Paranaguá, 111 - Consolação Aberto ao público em geral Promoção: Programa de Estudos Pós-Graduados em Educação Matemática
David and Sue relax on the 40th floor Italian Terrace, the highest restaurant in São Paulo for lunch.	David presents his talk on ‘Three Worlds of Mathematics’ to an audience of around a hundred academics, translated into Portuguese by Lulu Healy.
Presentations after the lecture.	Discussion afterwards.
David with Lulu Healy who acted as interpreter for the presentation.	David, relaxing in the roof garden with Tânia Campos, Director of the Centro de Ciências Exatas e Tecnologia, and Lulu and Victor.