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Random Quotation

Warren, Robert Penn (1905-)

What if angry vectors veer
Round your sleeping head, and form.
There's never need to fear
Violence of the poor world's abstract storm.

Lullaby in Encounter, 1957.

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Loci: Loci: Convergence

On This Day ...

Important events from the history of math that happened on this day:

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November 7th

1631 Pierre Gassendi observes the transit of Mercury across the sun, the first observation of a transit of a planet. This had been predicted by Kepler in 1629.

More information about:
Transit of Mercury
Pierre Gassendi
Johannes Kepler
1940 "Galloping Gertie," suspension bridge over the Narrows of Puget Sound, Tacoma, Washington, breaks up from a torsional oscillation of steadily increasing amplitude caused by the wind known as the von Karman vortice street. The film is instructive for classes in Differential Equations.

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Galloping Gertie
Torsional Oscillation

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