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 (lə-grānj′, -gränj′, lä-gräNzh′), Comte Joseph Louis 1736-1813.
French mathematician and astronomer. He developed the calculus of variations (1755) and made a number of other contributions to the study of mechanics.


(French laɡrɑ̃ʒ)
(Biography) Comte Joseph Louis (ʒozɛf lwi). 1736–1813, French mathematician and astronomer, noted particularly for his work on harmonics, mechanics, and the calculus of variations
Lagrangian adj


(ləˈgreɪndʒ, -ˈgrɑndʒ, -ˈgrɑ̃ʒ)

Joseph Louis, Comte, 1736–1813, French mathematician and astronomer.
References in periodicals archive ?
Appendices adapt the Melrose-Uhlmann notion of an intersecting Lagrangian distribution to the semiclassical setting, and construct the Melrose-Taylor parametrix.
The Lagrangian particle-based probabilistic approach is a practical alternative in which the myriad of cloud and precipitation particles present in a natural cloud is represented by a judiciously selected ensemble of point particles called superdroplets or superparticles.
These positions are called Lagrangian points, and a system of any two bodies has five of them, labeled L1, L2, L3, L4 and L5.
A relay satellite, named Queqiao (Magpie Bridge), for Chang'e-4 has entered a Halo orbit around the second Lagrangian (L2) point of the Earth-Moon system, about 65,000 km from the Moon in June.
where: h is the distance between two Eulerian grid points and r denotes the distance between any two Eulerian and Lagrangian points.
He has taught modules in classical mechanics, Lagrangian and Hamiltonian mechanics, nuclear physics, particle physics, quantum field theory, and mathematics for physicists.
He said MET had been running analyses using the Hybrid Single Particle Lagrangian Integrated Trajectory Model (HYSPLIT), which is a computer model that is used to compute air parcel trajectories and dispersion or deposition of atmospheric pollutants.
The alternative approach works in the Lagrangian description.
In this section we try to derive a function depending on the domain; for this we use the Eulerian U or Lagrangian L derivative.
The final step will be to integrate the telescope onto the spacecraft and test the fully assembled observatory before it is launched to orbit the Sun at the L2 Lagrangian point, 1.5 million km from Earth.
(i) Let Y [subset] X be a Lagrangian constant cycle subvariety (i.e., dim Y = m and the pushforward map [A.sub.0] (Y) [right arrow] [A.sub.0](X) has image of dimension 1).

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