x = var('x')
y = var('y')

f(x,y) = 9*x^2 + 4*y^2


f(2,4), f(0.5, -3.25), f(sqrt(70), 1/sqrt(6)), 

SageDays/Kreyszig-8.4-1 (last edited 2010-08-11 18:46:07 by bhanukiran)