(adsbygoogle = window.adsbygoogle || []).push({}); Gravitational Lensing - question

An article published today at http://spaceflightnow.com/news/n0402/11lens/ stated that "Einstein's general theory of relativity predicts there should be an odd number of images, yet almost all observed lenses have only 2 or 4 known images."

How and Why does Einstein's General Relativity predict an odd number of images?

Thanks,

Glenn

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# Gravitational Lensing

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