In this article, we review some properties of the harmonic quadrilateral related to triangle simedians and to Apollonius’s Circle.

This volume includes 37 papers of mathematics or applied mathematics written by the author alone or in collaboration with the following co-authors: Cătălin Ba

This fourteenth volume of Collected Papers is an eclectic tome of 87 papers in Neutrosophics and other fields, such as mathematics, fuzzy sets, intuitionistic f

We approach several themes of classical geometry of the circle and complete them with some original results, showing that not everything in traditional math is