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| Title: | Mathematics at DEC |
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| Moderator: | RUSURE::EDP |
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| Created: | Mon Feb 03 1986 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2083 |
| Total number of notes: | 14613 |
1793.0. "Crux Mathematicorum 1864" by RUSURE::EDP (Always mount a scratch monkey.) Mon Sep 20 1993 15:07
Proposed by George Tsintsifas, Thessaloniki, Greece.
Consider the three excircles of a given triangle ABC. Let P be the
radius of the circle containing and internally tangent to these three
circles. Prove that P >= 7r, where r is the inradius of triangle ABC.
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