On the Digitally Quasi Comultiplications of Digital Images

Abstract

In this article we study the digitally quasi comultiplications on the digital wedge products of pointed digital images. Especially, after defining a digitally quasi co-H-space and a digital Whitehead product, we calculate the cardinal number of the set of digital homotopy classes based on digitally quasi comultiplications of the wedge products of pointed digital images, and construct a digitally quasi co-H-space as a digital retract of a given digital image.