Quadratic Reciprocity
In terms of the Legendre symbol, the law of quadratic reciprocity for positive odd primes states
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Famous quotes containing the word reciprocity:
“Between women love is contemplative; caresses are intended less to gain possession of the other than gradually to re-create the self through her; separateness is abolished, there is no struggle, no victory, no defeat; in exact reciprocity each is at once subject and object, sovereign and slave; duality become mutuality.”
—Simone De Beauvoir (1908–1986)