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Results tagged with convexity
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user 85599
For questions involving the concept of convexity
2
votes
1
answer
377
views
Is this a log-concave function?
Let $(a_k)$ be a log-concave positive decreasing sequence. Is $\sum\limits_{k=1}^n a_k(1-e^x)^{k-1}$ log-concave in $x<0$, for each natural $n$?
- 79
5
votes
0
answers
540
views
Log-concave polynomial is a log-concave function?
A polynomial $\sum\limits_{k=0}^n a_kx^k$ is log-concave if $a_0,\ldots,a_n$ constitute a log-concave sequence. I wonder whether the log-concave polynomial is also a log-concave function with respect …
- 79