The author's biographical note is supposed to make it pretty clear why he was led to write this book in a language almost completely foreign to his everyday world.This book is the offspring of two different states of mind, initially, in the spring of 2020, the purpose was to overcome the boresome loneliness of the confinement imposed by the widespread pandemic, and thus an argumentative essay was constructed, titled ? in a rather technical style: The exact trianglature of the semicircle in the 20th century USA ? and eventually uploaded, as a critical paper, on the Academia.edu internet platform. Then suddenly, last autumn, the surprising news that a pirated edition of this article was being sold in Central Europe (in Germany and Switzerland, at least) in e-book format, seemingly an auspicious omen, rang a bell: the main project was feasible.The main project, now the purpose of this book, is to document global citizenship about a well-hidden case of corporate wrongdoing. Really, never in the history of science, not even in the time of the Pythagoreans twenty-five centuries ago, has a corporation of scientists ever gone so far in covering up a scientific feat owing to mere and vulgar sectarianism as the various guilds of mathematicians, principally the International Mathematical Union, over the last four decades. On a certain page of this book, the reader will find, written in just two lines of text in elementary symbolic notation, a mathematical proof dating from the late 1970s which the international scientific communities in the field and not only had been looking for since 1665? and was then buried alive.To definitely and openly prove that proof wrong or, if impossible, to definitively, competently and honestly recognize its perfect exacteness is the challenge left here to the IMU as the champion of all mathematical societies in the world: in a word, to this august, long-stealthy Mathemafia.