I would like to ask whether there exists a strictly quasiconcave function that is not quasiconcave. I would say that opposite is true. Thank you in advance for help.
I fount this statement: Strictly quasiconcave function does not have to be quasiconcave. I would also say that stricly quasiconcave implies that a function is quasiconcave. That is why I ask whether it is possible to find a function which is strictly quasiconcave but it is not quasiconcave.
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