# set terminal svg size 600,400 dynamic enhanced fname 'arial'  fsize 10 mousing name "singulr_18" butt solid 
# set output 'singulr.18.svg'
set dummy u,v
unset key
set parametric
set view 60, 20, 1, 1
set isosamples 39, 40
set hidden3d back offset 1 trianglepattern 3 undefined 1 altdiagonal bentover
set style data lines
set title "Klein bottle with look at the 'inside'" 
set urange [ 0.00000 : 6.28319 ] noreverse nowriteback
set vrange [ 0.00000 : 4.18879 ] noreverse nowriteback
set xrange [ -10.0000 : 10.0000 ] noreverse nowriteback
set yrange [ -10.0000 : 10.0000 ] noreverse nowriteback
set zrange [ -3.00000 : 3.00000 ] noreverse nowriteback
splot  (2*sin(u)*cos(v/2)-sin(2*u)*sin(v/2)+8)*cos(v),        (2*sin(u)*cos(v/2)-sin(2*u)*sin(v/2)+8)*sin(v),         2*sin(u)*sin(v/2)+sin(2*u)*cos(v/2)