Timeline for A question concerning convex functions
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
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| Jul 28, 2013 at 17:08 | vote | accept | CommunityBot | ||
| Jul 28, 2013 at 16:10 | history | edited | Alexandre Eremenko | CC BY-SA 3.0 |
added 48 characters in body
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| Jul 28, 2013 at 16:05 | comment | added | Alexandre Eremenko | Silvi: thanks, I corrected the error. | |
| Jul 28, 2013 at 16:04 | history | edited | Alexandre Eremenko | CC BY-SA 3.0 |
added 12 characters in body
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| Jul 28, 2013 at 15:13 | comment | added | user37834 | @Alexandre: Reading the necessity part of you nice answer tells me you should edit the first line of your answer. I think you meant $\frac{\sum x_j}{n} = \frac{a+b+c}3$. | |
| Jul 28, 2013 at 11:34 | comment | added | Alexandre Eremenko | About barycenter: second expression. It is also called the center of gravity. About affine function: take any one which is 0 at A and 1 at B. | |
| Jul 28, 2013 at 9:16 | comment | added | user30300 | First, By the barycenter of $x_j$, you mean $\sum x_j$ or $\frac{\sum x_j}{n}$ ? Second, would you give a tip on how do you construct the affine function claimed in the last line of your answer. | |
| Jul 28, 2013 at 7:54 | history | answered | Alexandre Eremenko | CC BY-SA 3.0 |