Marcus Waurick Books

The Callias Index Formula Revisited
The Callias Index Formula Revisited

By Fritz Gesztesy, Marcus Waurick, Fritz Gesztesy, Marcus Waurick (Auth.)

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These lecture notes aim at providing a purely analytical and accessible proof of the Callias index formula. In various branches of mathematics (particularly, linear and nonlinear partial differenti...

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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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