- Alpha Corvi (a Corvi, abbreviated Alpha Crv, a Crv), also named Alchiba /’�lk?b?/, is an F-type main-sequence star and, despite its “alpha” designation, is the fifth-brightest star in the constellation of Corvus. Based on parallax measurements made by the Gaia mission, it is approximately 49 light-years from the Sun.
The calculus was the first achievement of modern mathematics and it is difficult to overestimate its importance. I think it defines more unequivocally than anything else the inception of modern mathematics, and the system of mathematical analysis, which is its logical development, still constitutes the greatest technical advance in exact thinking.
John von Neumann, in James R. Newman The World of Mathematics