Lecture notes [PDF] of talk of February 24, 2009  Treasure map for the talk, Endpaper in HCMR, Fall 2008 [PDF of entire issue].  Navigation guide 
M4V, Ogg Webm. 
M4V, Ogg Webm. 
Scene from the Disney 1950 Movie: "Treasure Island". Here is a problem to
this movie: can you prove that the Diophantine equation
5 x^{4} = 3 + 7 y^{4}has no integer solutions? Hint: look at the equation modulo some number n and listen to Long John Silver's parrot. 
Scene from the Disney 1950 Movie: "Treasure Island". The treasure map. 
Pieces of Eight: Spanish Dollars 
Postscripts:
