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In the calculus of variations, the Euler–Lagrange equation, Euler's equation, or Lagrange's equation (although the latter name is ambiguous—see disambiguation page), is a second-order partial differential equation whose solutions are the functions for which a given functional is stationary.
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An algebraic problem of finding four numbers, given the products of each of the numbers with the sum of the three others 0 out of 5 stars based on 0 ratings.