Inegalitatea Finsler-Hadwiger pentru tetraedru

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Inegalitatea Finsler-Hadwiger pentru tetraedru

Post by Cezar Lupu »

Sa se arate ca in orice tetraedru \( A_{1}A_{2}A_{3}A_{4} \) de muchii \( a_{1}, a_{2}, \ldots , a_{6} \) are loc inegalitatea:

\( \sum_{i=1}^{6} a_{i}^{2}\geq 12\sqrt[3]{9}V^{2/3}+\frac{1}{3}\sum_{1\leq i<j \leq 6} (a_{i}-a_{j})^{2} \).
An infinite number of mathematicians walk into a bar. The first one orders a beer. The second orders half a beer. The third, a quarter of a beer. The bartender says “You’re all idiots”, and pours two beers.
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