In mathematics, a real algebraic integer α > 1 is a Salem number if all its conjugate roots have absolute value no greater than 1, and at least one has absolute value exactly 1. Salem numbers are of interest in Diophantine approximation and harmonic analysis. They are named after Raphaël Salem.
Read more about Salem Number: Properties, Relation With Pisot–Vijayaraghavan Numbers
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—Henry David Thoreau (1817–1862)
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—François, Duc De La Rochefoucauld (1613–1680)