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Timeline for subadditive implies concave

Current License: CC BY-SA 2.5

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Aug 16, 2010 at 8:15 history edited Gerald Edgar CC BY-SA 2.5
added 299 characters in body; edited body
Aug 15, 2010 at 23:57 comment added Dan Brumleve Except actually it's not: 922.658 = 2 * f(500) < f(1000) = 953.059
Aug 15, 2010 at 23:37 comment added Dan Brumleve Nice. Another way to write f(x) is x - 12 (log(1 + x) + 3/(1 + x) - 3) which makes it more apparent to me that f is subadditive.
Aug 15, 2010 at 23:26 comment added alex why is this f subadditive?
Aug 15, 2010 at 21:32 history answered Gerald Edgar CC BY-SA 2.5