test_phiquad2D.java running
phiquad2D instantiated
x1=0.1, y1=0.2
x2=1.3, y2=0.3
x3=1.4, y3=2.4
x4=0.6, y4=2.3
phi(x1,y1)=1.0  should be 1
phi(x2,y2)=0.0  should be 0
phi(x3,y3)=0.0  should be 0
phi(x4,y4)=0.0  should be 0
at x=0.4, y=0.6000000000000001
phiquad2D,phix=-0.6609256216852765, dx=-0.6607328659904848, err=-1.9275569479171306E-4
at x=0.4, y=0.6000000000000001
phiquad2D,phiy=-0.34026717457773376, dy=-0.339338864964721, err=-9.283096130127677E-4
at x=0.7000000000000001, y=1.0
phiquad2D,phixx=0.44069776428324225, dxx=0.4406977642832414, err=8.326672684688674E-16
at x=0.7000000000000001, y=1.0
phiquad2D,phiyy=-0.07712494172568135, dyy=-0.07712494172568014, err=-1.2073675392798577E-15
at x=0.4, y=0.6000000000000001
phiquad2D,phixy=1.0837289490043904, dxy=1.0837289490043922, err=-1.7763568394002505E-15