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slope of a curve slope of a line Figure 2: Straight lines (see text). duality The French mathematician René Descartes (1596–1650) demonstrated that the square root of any line segment could be constructed by the simple, but ingenious, addition of a line segment with unit length.
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Ethel Rosenberg arrested in August 1950. Photograph dated Aug. 8, 1950. American civilians executed for espionage. Spies, communists, Julius Rosenberg
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Aurochs. Bos primigenius. Skeleton. Extinct animal. Skeleton of an Aurochs, an extinct wild ox.
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Photos

slope of a curve
slope of a line
Figure 2: Straight lines (see text).
duality
The French mathematician René Descartes (1596–1650) demonstrated that the square root of any line segment could be constructed by the simple, but ingenious, addition of a line segment with unit length.
See All Images →

Related Topics and References

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Key People

Plücker, Julius
Julius Plücker
German mathematician and physicist