Poincare theorem

BG Yoda

Can somebody give me a hint what implies the Poincare theorem?

I know it is something about an inscribed and described $n -$ polygon... but the main statement is incomprehensible to me Embarassed

**Posted:** Tue Mar 17, 2009 12:23 am

puuhikki · Yang-Mills Theory Offline Joined: 06 Jun 2005 Posts: 849

Do you mean Poncelet's porism?

**Posted:** Tue Mar 17, 2009 11:55 am

BG Yoda

Exactly

Thank you puuhikki Razz

Is there a geometric proof by the way ? Blush

**Posted:** Wed Mar 18, 2009 12:34 pm

luisgeometria

In fact the demostration is way complicated,,for real....see that link http://mathworld.wolfram.com/PonceletsPorism.html

this porism is powerful!

**Posted:** Wed Mar 18, 2009 3:39 pm