How to prove function is concave?

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  1. Let C be a set in a real or complex vector space. C is star convex if there exists an x 0 in C such that the line segment from x 0 to any point y in C is contained in C
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  3. 54 LECTURE 3. CONVEX FUNCTIONS functions convex on the whole axis: x2p, pbeing positive integer; expfxg; functions convex on the nonnegative ray:
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  5. Jensen's Inequality :

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  7. AMAZING ANALEMMA in the Concave Earth! :

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