# set terminal pngcairo  transparent enhanced font "arial,10" fontscale 1.0 size 600, 400 
# set output 'singulr.3.png'
set dummy u, v
set parametric
set view 60, 120, 1, 1
set isosamples 21, 21
set hidden3d back offset 1 trianglepattern 3 undefined 1 altdiagonal bentover
set style data lines
set title "Imaginary part of complex square root function" 
set urange [ -3.00000 : 3.00000 ] noreverse
set vrange [ -3.00000 : 3.00000 ] noreverse
NO_ANIMATION = 1
splot u**2-v**2,2*u*v,v