FEYNMAN, RICHARD P., AM, 8 PP, ON RUNGA-KUTTA METHODS POSSIBLY FOR COMPUTER CODING, CA 1970S-80S.

Autograph manuscripts, 8 pp on 4 sheets, (5 3/4 x 8 1/4 in & 8 1/2 x 11 in) in red and black ink on plain white wove paper (3 sheets) and black ink on white ruled paper (1 sheet). Some toning and tattering to edges of larger sheet.

FEYNMAN WORKING ON FIRST AND SECOND ORDER RUNGE-KUTTA METHODS FOR THE NUMERICAL INTEGRATION OF ORDINARY DIFFERENTIAL EQUATIONS, SEEMINGLY IN RELATION TO COMPUTER CODING.  A wonderful pair of manuscripts showing Feynman's keen interest in computer coding and life-long love of arithmetic. The larger sheet focuses on 1st order Runge-Kutta, and cites Carnaham, Luther, and Wilkes' 1969 work Applied Numerical Methods. The second manuscript, in red ink, is very detailed, and contains neatly written codes, calculations and accompanying flow-charts, additionally citing Janhke & Emde, referring to their epic Tables of Functions with Formulae and Curves.