Lagrange-joseph-louis definitions

lə-grānj', -gränj', lä-gräɴzh'
French mathematician and astronomer. He developed the calculus of variations (1755) and made a number of other contributions to the study of mechanics.
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Italian-born French mathematician and astronomer who made important contributions to algebra and calculus. His work on celestial mechanics extended scientific understanding of planetary and lunar motion. In 1772 he discovered the points in space that are now named for him.
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