Rudolf Fritsch Books

Cellular Structures in Topology

By Rudolf Fritsch, Renzo Piccinini

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Four Color Theorem

By J. Lie Peschke, Rudolf Fritsch, Gerda Fritsch

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Mathematics and Theoretical Physics

By Rubens G. Lintz, Rudolf Fritsch, Minaketan Behara

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Mathematics and Theoretical Physics

By Rubens G. Lintz, Rudolf Fritsch, Minaketan Behara

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The Four-Color Theorem: History, Topological Foundations, and Idea of Proof

By Fritsch Rudolf, Rudolf Fritsch, Gerda Fritsch

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This elegant little book discusses a famous problem that helped to define the field now known as graph theory: what is the minimum number of colors required to print a map such that no two adjoinin...

Per aspera ad astra

By Rudolf Fritsch, Klaus Fessmann, Gerda Fritsch, Dietmar Graf

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Ich Bleibe Ein Wesen Eigener Art Prinzessin Therese von Bayern Wissenschaftlerin Forschungsreisende Mazenin 1850 1925 100 jahriges Jubilaum der Verleihung der Ehrendoktorwurde durch die Universitat Munchen Grundung der Therese von Bayern Stiftung zur Forderung von Frauen in der Wissenschaft

By Hadumod Bussmann, Eva Neukum Fichtner

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Staatsarchiv Amberg

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Zum Feuerbachschen Kreis

By Fritsch Rudolf

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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.