Englishfor English speakers
classical
Adjective
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Classical ideas or styles are those that were very common at a time in the past and sometimes continue into the present.
Classical theories in physics can't explain certain observations, which has led scientists to come up with new theories.
Lagrangian
adjective
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of or relating to Joseph Louis Lagrange
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astrophysics
Lagrangian
noun
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(mathematics) the Lagrangian function
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(astrophysics) an object residing in a Lagrange point / Lagrangian point
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astrophysics