Jan Karel Lenstra Books

The Traveling Salesman Problem

By A. H. G. Rinnooy Kan, Jan Karel Lenstra, E. L. Lawler, D. B. Shmoys

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Scheduling Theory and Its Applications

By Philippe Chretienne, Zhen Liu, Jan Karel Lenstra, Edward G. Coffman

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Local Search in Combinatorial Optimization

By Emile Aarts, Jan Karel Lenstra

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In the past three decades local search has grown from a simple heuristic idea into a mature field of research in combinatorial optimization. Local search is still the method of choice for NP-hard p...

Local Search in Combinatorial Optimization

By Emile Aarts, Jan Karel Lenstra

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Automata Languages and Programming

By Jos C.M. Baeten, Joachim Parrow, Jan Karel Lenstra, Gerhard J. Woeginger

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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.