Herbert Federer (July 23, 1920 – April 21, 2010) was an American mathematician. He is one of the creators of geometric measure theory, at the meeting point of differential geometry and mathematical analysis.
Read more about Herbert Federer: Career, Normal and Integral Currents, Earlier Work, Geometric Measure Theory
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“Simile and Metaphor differ only in degree of stylistic refinement. The Simile, in which a comparison is made directly between two objects, belongs to an earlier stage of literary expression; it is the deliberate elaboration of a correspondence, often pursued for its own sake. But a Metaphor is the swift illumination of an equivalence. Two images, or an idea and an image, stand equal and opposite; clash together and respond significantly, surprising the reader with a sudden light.”
—Sir Herbert Read (1893–1968)