| 11. | He is well known for his research in analysis and the calculus of variations.
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| 12. | His main fields of research are the calculus of variations and geometric measure theory.
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| 13. | This may be expressed mathematically using the calculus of variations
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| 14. | By the fundamental lemma of the calculus of variations, the integrand must vanish identically:
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| 15. | And, yes I'm aware that it is absolutely fundamental in the calculus of variations.
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| 16. | The method became known as " the royal road to the calculus of variations ".
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| 17. | Euler invented the calculus of variations including its most well-known result, the Euler Lagrange equation.
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| 18. | :There are other meanings of the word such as lambda calculus or calculus of variations.
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| 19. | :In general, the techniques for functional optimization problems are those of the calculus of variations.
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| 20. | He was honored for solving, in 1930, the inverse problem of the calculus of variations.
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