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Jul 20, 2017 at 19:30 comment added Hannes $n=m=1$, $f(x) = x$, $C = K = (-\infty,0]$, $A = 1$, $b = 0$, $U = \{c\}$ for any $c < 0$..
Jul 20, 2017 at 17:50 history asked matematicaActiva CC BY-SA 3.0