Sigurdur Helgason Books

Differential Geometry and Symmetric Spaces

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Although much has happened in the field since the publication of this book, this single volume on Riemannian geometry and for the analysis and geometry of symmetric spaces still offers a clear over...

Groups and geometric analysis: integral geometry, invariant differential operators, and spherical functions

By Sigurdur Helgason

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Differential Geometry and Symmetric Spaces

By Sigurdur Helgason

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Differential Geometry, Lie Groups, and Symmetric Spaces, Volume 80

By Sigurdur Helgason

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The Radon Transform Progress in Mathematics

By Sigurdur Helgason

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"The Radon transform is an important topic in integral geometry which deals with the problem of expressing a function on a manifold in terms of its integrals over certain submanifolds. Solutions to...

Geometric analysis on symmetric spaces

By Sigurdur Helgason

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The Radon Transform

By Sigurdur Helgason

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Topics in Harmonic Analysis on

By Sigurdur Helgason, Helgason

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Groups and geometric analysis

By Sigurdur Helgason

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Integral geometry

By AMS IMS SIAM Joint Summer Research Conference In The Mathematical Sciences On Integral Geometry 1984 Bowdoin College

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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.