# set terminal svg size 600,400 dynamic enhanced fname 'arial'  fsize 10 mousing name "singulr_1" butt solid 
# set output 'singulr.1.svg'
set dummy u,v
set parametric
set isosamples 21, 21
set hidden3d back offset 1 trianglepattern 3 undefined 1 altdiagonal bentover
set title "Real part of complex square root function" 
set urange [ -3.00000 : 3.00000 ] noreverse nowriteback
set vrange [ -3.00000 : 3.00000 ] noreverse nowriteback
splot u**2-v**2,2*u*v,u