536 Ordinary Differential Equations
;;; PORTRAIT l!!iliJl!J
Enter the SJitem defining functions Fl , F2 Enter the numbe1 of initial value problems to solve
y'l =Fl = j•y2·2'y1'l'1·1
y'2 = F2 = js•y1-y2'i·_2·-7 ------------'
For each initial value problem i. enter lhe interval of integration (ai. hll. the initial value ci. Hmax =
and the initial conditions dli and d2i. '----...r
Horizontal Range
Hmin= ;---.,.----!
i= ail= bi= cic:i dli= d2i=
fl" I 11 o
Vm~^12 ..:::====I =;==!_::=:;,::...:;====:--:====::;::;==~.'=;=====~2.5 ::!....'====i='===!-.----lL.;~!!!!!::!__!
Figure B.10 Phase-Plane Graph of System (4) Using
Initial Conditions (i) Through (x)