• Hwk p 297 # 1, 4, 7, 10, 16, 18, 19, 21, 22, 27, 33, 36, 41.
• Some solutions: exam 2b .
• A file about phaseplane analysis .
• Another file about phase planes and the example on p. 293 in the text.
• A Maple file about critical points.
• Click here and open the Maple file. Oct 31 item.
• Binary binary star
• Click here for today's material
• Project-related Maple files. higher order constant coefficients. Calculations related to the proof of existence and uniquness .