Cristian Calude Books

Theories of Computational Complexity

By Cristian Calude

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Computing with Cells and Atoms

By Cris Calude, Gheorghe Paun

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Unconventional Models of Computation

By International Conference On Unconventional Models Of Computation 3rd 2002 Kobe Japan

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Information and Randomness

By Cristian S. Calude

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The book presents in a mathematical clear way the fundamentals of algorithmic information theory and a few selected applications. This 2nd edition presents new and important results obtained in rec...

J.UCS. The Journal of Universal Computer Science

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J.ucs. the Journal of Universal Computer Science

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J. UCS

By Cristian Calude, Hermann A. Maurer, Arto Salomaa

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J. UCS - the electronic journal that covers all areas of computer science. The high quality of all accepted papers is ensured by a strict review process and an international editorial board of dist...

Multiset Processing

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Information and randomness

By Cristian Calude

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Information and Randomness

By Cristian Calude

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"Algorithmic information theory (AIT) is the result of putting Shannon's information theory and Turing's computability theory into a cocktail shaker and shaking vigorously", says G.J. Chaitin, one...

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.