The calculus of friendship what a teacher and a student learned about life while corresponding about math - Strogatz, Steven H. (Steven Henry); Joffray, Don 1929-. (Princeton, N.J. Princeton University Press, 2009)
Continuity (1974-75) -- Pursuit (1976) -- Relativity (1977) -- Irrationality (1978-79) -- Shifts (1980-89) -- Proof on a place mat (March 1989) -- The monk and the mountain (1989-90) -- Randomness (1990-91) -- Infinity and limits (1991) -- Chaos ( 1992-95) -- Celebration (1996-99) -- The path of quickest descent (2000-2003) -- Bifurcation (2004) -- Hero's formula (2005-present).
Includes bibliographical references (p. [157]-162) and index.
Keywords: Strogatz, Steven H. -- Correspondence; Joffray, Don -- 1929- -- Correspondence; Mathematicians -- Correspondence; Calculus; Differential equations; Chaotic behavior in systems