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Particle–Particle–Particle–Mesh (P 3 M) is a Fourier-based Ewald summation method [1] [2] to calculate potentials in N-body simulations. [3] [4] [5]The potential could be the electrostatic potential among N point charges i.e. molecular dynamics, the gravitational potential among N gas particles in e.g. smoothed particle hydrodynamics, or any other useful function.
Ewald summation, named after Paul Peter Ewald, is a method for computing long-range interactions (e.g. electrostatic interactions) in periodic systems.It was first developed as the method for calculating the electrostatic energies of ionic crystals, and is now commonly used for calculating long-range interactions in computational chemistry.
The Martin XP2M-1 A Martin-built P3M-2 at NAS Pensacola Consolidated flying boat produced for evaluation by Japan. The Consolidated P2Y was an American sesquiplane maritime patrol flying boat. The aircraft was also made by Martin as the P3M, as a parasol monoplane, due to the Navy awarding production contracts separately from prototype contracts.
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The 17 wallpaper groups, with finite fundamental domains, are given by International notation, orbifold notation, and Coxeter notation, classified by the 5 Bravais lattices in the plane: square, oblique (parallelogrammatic), hexagonal (equilateral triangular), rectangular (centered rhombic), and rhombic (centered rectangular).
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