It is intended to be reasonably complete in the coverage of topics frequently included in precollege or undergraduate college mathematics courses. In addition many other interesting and important mathematical concepts are included. Thus the dictionary is a valuable reference book for both amateur and professional mathematicians. This edition continues revisions and enlargements as in previous editions with particular emphasis on updating the coverage of probability and statistics. The major change in the present edition is the introduction of a large number of short biographical statements for persons whose contributions have been particularly important or whose names appear in the dictionary for other reasons. An important feature continued in this edition is the multilingual index in French German Russian and Spanish. The English equivalents of mathematical terms in these languages enable the reader not only to learn the English meaning of a foreign-language mathematical term but also to find its definition in the body of this book. Main headings are printed in boldface capitals beginning at the left margin. Each main heading that is also a proper name is followed by the appropriate given names birth and death dates and a short biographical statement to the extent that these have been determinable.
