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Joseph Adhemar

male, deceased
Joseph Alphonse Adhemar (1797 - 1862) was a French mathematician. He was the first to suggest that ice ages were controlled by astronomical forces... More

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mathematician right angle antarctic earth's orbit solstice Ellipse … Spring equinox

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Erhard Weigel

Erhard Weigel

male, deceased
Erhard Weigel (1625-1699) was a German mathematician, astronomer and philosopher. He earned his Ph.D. from the University of Leipzig. From 1653... More

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Christian Gottfried Wilhelm von Leibniz philosopher mathematician gregorian calendar weigel … Spring equinox

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