Differential Equations for Electrical Engineers by Philip Franklin (1947 HC w/o DJ) Author: Philip Franklin (1898–1965) Publisher: John Wiley Sons, Inc. New York, NY U.S.A. 1933 Textbook developed by one of America's premier 20th century mathematicians. During the 1920s, Dr. Franklin taught a junior level course in differential equations for electrical engineering students (summarized in 1st 6 chapters). Then in the final two chapters, he develops the framework and theorems which prove why those techniques work and indicate how to solve such problems with more general methods, thus presenting a basic introduction to modern Mathematical Analysis in 61 pages. Book includes 46 sets of exercises for the reader, answers to select problems, bibliography, and index. vii + 299pp. 1933 publication date. Philip Franklin (1898–1965) was an American mathematician and professor whose work was primarily focused in mathematical analysis. Dr. Franklin received a B.S. in 1918 from City College of New York (who later awarded him its Townsend Harris Medal for the alumnus who achieved notable postgraduate distinction). He received his M.A. in 1920 and Ph.D. in 1921 both from Princeton University. His dissertation, The Four Color Problem, was supervised by Oswald Veblen. After teaching for one year at Princeton and two years at Harvard University (as the Benjamin Peirce Instructor), Franklin joined the Massachusetts Institute of Technology Department of Mathematics, where he stayed until his 1964 retirement. In 1922, Franklin gave the first proof that all planar graphs with at most 25 vertices can be four-colored. In 1928, Franklin gave the first description of an orthonormal basis for L([0,1]) consisting of continuous functions (now known as "Franklin's system"). In 1934, Franklin disproved the Heawood conjecture for the Klein bottle by showing that any map drawn on the Klein bottle can be colored with at most six colors. Perhaps his most famous result is an example which shows that six colors may be needed is the 12-vertex cubic graph now known as the Franklin graph. Hardcover has blue cloth boards, silver lettering on spine, front cover empressed with Wiley seal, but no DJ. This copy was privately owned, but not by a student studying a course. This book spent most of its existence on a shelf, square corners and looks better than most copies of any books on the shelves of a new book store. Most likely an instructor copy or a sales sample. Interior is tight, clean and unmarked, no ownership. Size: 8vo - over 7 - 9" tall, 306pp Condition: Fine (As New) Hardcover w/o DJ – Always privately owned. 1st Edition, later printing. Copyright 1933. Stated from sixth printing, October, 1947. First Edition (except for having the correction of any initial errata) assumed. Printed in U.S.A. No ISBN, LCCN, nor MSR. Notes on Condition/Edition ratings: Fine – means like new, but any book produced over 10 years ago isn't “brand new” or even “new.” Booksellers needed some word to describe this... Like New – A new book, no marks no damage (except maybe remainder marks or shelf-wear) except not obtained directly from the publisher or in packaging from the publisher. Very Good – How you or I might take care of a book, closer to “as new” than standard. Might show ownership. Good – How someone else might take care of a book. Also referred to as “standard.” This is the most likely condition for books of this age title, shows the book has been read or previously owned. Acceptable – How a child, student or a librarian might take care of a book. (Either trying to make sure someone doesn't steal it by plastering ownership everywhere, filled it with copious notes or a book that has been damaged.) Poor – Combination of “acceptable” factors above. Most likely with water damage as well. Might have missing pages (you should ask). Near – Means “almost” in an optimistic sense. e.g., “Near Fine” means very good, but on the high end. 1st Thus – Unique somehow, maybe 1st paperback, new illustrator, misprint or even the 1st edition. A collector might desire this copy. Thanks for looking!