' - - File: VIII_Multi5.txt

' Given (x,y) --> <F, H>, construct the directed field. Try  h = 0.05 setting.

F{x,y} = x - y
H{x,y} = x^2 + y^2

G{x,y} = - F{x,y} / H{x,y}

a = -3  :  b = 3  :  n = 15
c = -3  :  d = 3  :  m = 15

x1 = 0  :  y1 = 1
x2 = 1  :  y2 = 0
x3 = -2  :  y3 = 2

PlotDirField[F, H, {a,b,n}{c,d,m}]

PlotSlopeField[G, {a,b,n}{c,d,m}{x1,y1}{x2,y2}{x3,y3}]

