theorem Th43: :: JGRAPH_4:43

for sn being Real
for q being Point of (TOP-REAL 2) st - 1 < sn & q `1 < 0 & (q `2) / |.q.| < sn holds
for p being Point of (TOP-REAL 2) st p = (sn -FanMorphW) . q holds
( p `1 < 0 & p `2 < 0 )