In
mathematics, the epigraph or supergraph
of a
function
Function or functionality may refer to:
Computing
* Function key, a type of key on computer keyboards
* Function model, a structured representation of processes in a system
* Function object or functor or functionoid, a concept of object-oriente ...
if and only if its epigraph is a convex set. The epigraph of a real affine function
A function is Semi-continuity, lower semicontinuous if and only if its epigraph is
.
(1996), ''Convex Analysis'', Princeton University Press, Princeton, NJ. .
{{Convex analysis and variational analysis