Franz Lemmermeyer Books

Vorlesungen uber Zahlentheorie

By Karl Gustav Jakob Jacobi

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Emil Artin and Helmut Hasse

By Peter J. Roquette, Franz Lemmermeyer, Gunther Frei

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The Quadratic Reciprocity Law

By Oswald Baumgart, Franz Lemmermeyer

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The Quadratic Reciprocity Law

By Oswald Baumgart, Franz Lemmermeyer

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Reciprocity Laws From Euler to Eisenstein Springer Monographs in Mathematics

By Franz Lemmermeyer

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This book is about the development of reciprocity laws, starting from conjectures of Euler and discussing the contributions of Legendre, Gauss, Dirichlet, Jacobi, and Eisenstein. Readers knowledgea...

Reciprocity Laws

By Franz Lemmermeyer

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Quadratische Zahlkorper

By Franz Lemmermeyer

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Mathematik a la Carte

By Franz Lemmermeyer

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Quadratic Number Fields

By Franz Lemmermeyer

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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.