Pedro Morettin <pam@ime.usp.br> Seminario Series Temporais, Analise de Dependencia e Aplicacoes em Atuaria e Financas Dia 11/10/2005, Terca Feira, 17 horas Sala 254, Bloco A, IME-USP (note a mudanca da sala) "The Envelopes from St. Petersburg" Sergio Wechsler IME-USP The two envelopes paradox is solved and, with a slight modification, seen to be a variation of St. Petersburg's paradox.