Harvey Cohn Books

A Classical Invitation to Algebraic Numbers and Class Fields

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From the reviews/Aus den Besprechungen: "...Für den an der Geschichte der Zahlentheorie interessierten Mathematikhistoriker ist das Buch mindestens in zweierlei Hinsicht lesenswert. Zum einen enthä...

Number Theory: New York Seminar 1989-1990

By David V. Chudnovsky, Harvey Cohn, Melvyn B. Nathanson, Gregory V. Chudnovsky, D. V. Chudnovsky, H. Cohn, G. Chudnovsky

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This is a volume of papers presented at the New York Number Theory Seminar. Since 1982, the Seminar has been meeting weekly during the academic year at the Graduate School and University Center of...

Advanced Number Theory

By Harvey Cohn

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Conformal Mapping on Riemann Surfaces

By Harvey Cohn

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Introduction to the Construction of Class Fields

By Harvey Cohn

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Harvey Cohn

By Harvey Cohn, Harvey. Cohn

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Number Theory

By David V. Chudnovsky, Harvey Cohn, Melvyn B. Nathanson, Gregory V. Chudnovsky

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A Classical Invitation to Algebraic Numbers and Class Fields

By Harvey Cohn

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Advanced Number Theory

By Harvey Cohn

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Conformal Mapping on Riemann Surfaces

By Harvey Cohn

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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.