Hem yarı-dışbükey hem de yarı-içbükey olan bir fonksiyon yarı-doğrusaldır.
- A function that is both quasiconvex and quasiconcave is quasilinear.
... Writing is a very, very high-risk entrepreneurial venture that almost everybody who tries it ...
... And, yeah, lots of really big, almost, like, big Def ...