https://dgrav.org/2018/10/23/2019-einstein-prize-awarded-to-abhay-ashtekar/
2019 Einstein Prize awarded to Abhay Ashtekar – APS Division of Gravitational Physics
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https://igc.psu.edu/people/bio/ava1/
Abhay Ashtekar | Institute for Gravitation and the Cosmos
Institute for Gravitation and the Cosmos
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