APM  Vol.1 No.1 , January 2011
First Note on the Definition of S2-Convexity
Abstract: In this short, but fundamental, note, we start progressing towards a mathematically sound definition of the real functional classes 2sK
Cite this paper: nullP. Marcia, "First Note on the Definition of S2-Convexity," Advances in Pure Mathematics, Vol. 1 No. 1, 2011, pp. 1-2. doi: 10.4236/apm.2011.11001.

[1]   M. R. Pinheiro, “Convexity Secrets,” Trafford Publishing, Canada, 2008. ISBN: 1425138217.