Rainer Nagel Books

One-Parameter Semigroups of Positive Operators

By Rainer Nagel, Wolfgang Arendt

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A Short Course on Operator Semigroups Universitext

By Klaus Jochen Engel, Rainer Nagel

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One Parameter Semigroups for Linear Evolution Equations Graduate Texts in Mathematics

By Klaus Jochen Engel, Rainer Nagel

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"This book gives an up-to-date account of the theory of strongly continuous one-parameter semigroups of linear operators. It includes a systematic discussion of the spectral theory and the long-ter...

Fachsprache der Fantasy-Rollenspiele

By Rainer Nagel

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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.