Karl Endel Petersen Books

LMS: 28 Brownian Motion

By K. E. Petersen, Karl Endel Petersen

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Ergodic Theory

By Karl Petersen, Karl Endel Petersen, Karl E. Petersen

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Ergodic Theory

By Karl E. Petersen

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Ergodic Theory and Harmonic Analysis: Proceedings of the 1993 Alexandria Conference

By Karl Petersen

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Ergodic theory is a field that is lively on its own and also in its interactions with other branches of mathematics and science. In recent years the interchanges with harmonic analysis have been es...

Entropy of hidden Markov processes and connections to dynamical systems

By Tsachy Weissman, Brian Marcus, Karl Endel Petersen

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"Hidden Markov processes (HMPs) are important objects of study in many areas of pure and applied mathematics, including information theory, probability theory, dynamical systems and statistical phy...

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.