Olli Lehto Books

Mathematics Without Borders
Mathematics Without Borders

By Olli Lehto

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The history of international mathematical co-operation over the last hundred years - from the first international congress in 1897 to plans for the World Mathematical Year 2000 - is a surprisingly...

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Quasikonforme Abbildungen
Quasikonforme Abbildungen

By Dr. Olli Lehto

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Erhabene Welten
Erhabene Welten

By Olli Lehto

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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.

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