Non-Connected Convexities and Applications

Cristescu, G., & Lupșa, L. (2002). Non-Connected Convexities and Applications (p. 365). Springer Science & Business Media. Retrieved from https://books.google.com/books?id=ur8SxUvBblEC&pg=PA207&lpg=PA207&dq=convexoidal+function&source=bl&ots=PBSIrViQMn&sig=rBTQsYVLFr-mRRcq-ytllJLI0bg&hl=en&sa=X&ved=0ahUKEwiFyJLQ5PTNAhVGjZQKHRfVBRgQ6AEIHzAB#v=onepage&q=convexoidal function&f=false