theorem Th2: :: JGRAPH_5:2

for p being Point of (TOP-REAL 2) st |.p.| <= 1 & p `1 <> 0 & p `2 <> 0 holds
( - 1 < p `1 & p `1 < 1 & - 1 < p `2 & p `2 < 1 )