John R. Harper Books

Algebraic topology

By Marvin J. Greenberg

Average: 0.00, 0 Ratings

H-spaces with torsion

By John R. Harper

Average: 0.00, 0 Ratings

Secondary Cohomology Operations

By John R. Harper

Average: 0.00, 0 Ratings

"The book is written for graduate students and research mathematicians interested in algebraic topology and can be used for self-study or as a textbook for an advanced course on the topic."--BOOK J...

Combinatorial methods in topology and algebraic geometry

Average: 0.00, 0 Ratings

Development of a national directory of Canadian marine oil spill specialists

By John R. Harper

Average: 0.00, 0 Ratings

Algebraic Topology

By Marvin J. Greenberg, John R. Harper

Average: 0.00, 0 Ratings

Secondary Cohomology Operations

By John R. Harper

Average: 0.00, 0 Ratings

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.