Albus Dumbledore Snape saying, "Severus, please ...". To what Dumbledore was referring is not revealed until the seventh book. Dumbledore dies in Hogwarts' grounds. Shortly after his death, Dumbledore's portrait magically appears in the Headmaster's office. His funeral is attended by students, Hogwarts staff, members of the Ministry of Magic, ghosts, centaurs, merpeople and others who wish to pay their respects. Shrouded in purple velvet, he is entombed in a white marble sarcophagus beside the lake at Hogwarts, and it is said that he is the only headmaster to be buried on the school grounds. Rowling used several chapters in "Harry Potter
What Is Mathematics? What Is Mathematics? What Is Mathematics? is a mathematics book written by Richard Courant and Herbert Robbins, published in England by Oxford University Press. It is an introduction to mathematics, intended both for the mathematics student and for the general public. First published in 1941, it discusses number theory, geometry, topology and calculus. A second edition was published in 1996 with an additional chapter on recent progress in mathematics, written by Ian Stewart. The book was based on Courant's course material. Although Robbins assisted in writing a large part of the book, he had to fight for authorship. Nevertheless, Courant