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Results tagged with mg.metric-geometry
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user 38620
Euclidean, hyperbolic, discrete, convex, coarse geometry, metric spaces, comparisons in Riemannian geometry, symmetric spaces.
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vote
Inequality involving the side lengths of a quadrilateral
Let $T$ be the function in question:
$$
T(a,b,c,d) = a b^2(b-c) + b c^2 (c-d) + c d^2 (d-a) + d a^2 (a - b).
$$
We wish to show $T(a,b,c,d)\ge 0$ if $a,b,c,d$ are the sides of a quadrilateral. (Presum …
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