Pumpernickel coffee flavor, and earthy aroma. To achieve this, loaves are baked in long narrow lidded pans 16 to 24 hours in a low-temperature (about ), steam-filled oven. Like the French "pain de mie", Westphalian pumpernickel has little or no crust. It is very similar to rye "Vollkornbrot", a dense rye bread with large amounts of whole grains added. Pumpernickel varieties are popular in the Netherlands, under the name , where it has been a common part of the diet for centuries, and in Denmark where is a staple. German pumpernickel is often sold sliced in small packets in supermarkets, where
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