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Is there a special name for the functions in which all the local maxima are also the global maxima?

For e.g. sinusoidal wave is non-concave and it has multiple maxima. But each of the maxima are global maxima.

Thank you in advance.

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The sine curve is concave on some intervals and convex on others. Maybe you mean by "nonconcave" only that it isn't concave at every point of its domain? – coffeemath Jan 11 '13 at 14:24
yes, it isn't concave at every point of its domain. – karthik Jan 21 '13 at 12:23

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