This new mathematical theory, Diagonal Objects Theory, presented in this
book is an illustrative construction of the new mathematical architecture of future
events in mathematics and wider.
In this sense, the aim of this monograph is to give a systematic and integrated
account of the essential topics in the Diagonal Objects Theory that lies on the
borderline of functional analysis, geometry, topology, algebra, and ordered sets.
This theory is common to three disciplines: mathematics, phylosophy, and history.