From the moment that authors from different parts of the world began to question the absence of sociocultural bases in the formation of mathematical knowledge, inside and outside the academic universe, a fertile field was opened to face truths that had long been ignored in discourses about the nature of mathematics.This problem was addressed directly and creatively by the Brazilian educator and mathematician Ubiratan D'Ambrosio in 1977.In a talk at the annual meeting of the American Association for the Advancement of Science, D'Ambrosio introduced the term "ethnomathematics."He coined the term to break through the mythology of an absolute mathematics independent of cultural and historical contexts.This came in an atmosphere of sociological challenges to Platonic notions of mathematics