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The year 2019 saw the centenary of Eddington's eclipse expeditions and the corroboration of Einstein's general relativity by gravitational lensing. To mark the occasion, a Special Issue of Universe has been dedicated to the theoretical aspects of strong gravitational lensing. The articles assembled in this volume contain original research and reviews and apply a variety of mathematical techniques that have been developed to study this effect, both in 3-space and in spacetime. These include: - Mathematical properties of the standard thin lens approximation, in particular caustics; - Optical geometry, the Gauss-Bonnet method and related approaches; - Lensing in the spacetime of general relativity and modified theories; black hole shadows.

Gravitational Lensing and Optical Geometry: A Centennial Perspective

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Auto & Cycles

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Business & Finance

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Children's

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Computer & Electronic

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Entertainment & TV

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Family & Parenting

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Food & Beverage

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Home & Garden

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Men's

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News & Politics

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Science & Nature

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Travel & Leisure

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Value Bundles

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