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- W1986016670 abstract "We study a central difference semi-discretization of the cubic scalar conservation law. Both spatial period-2 (binary) and period-3 (ternary) oscillations are stationary solutions of this scheme, and we find where each type is linearly stable. We observe numerically the formation of ternary oscillations, to the left of Riemann shock initial data with ur = 0, while binary oscillations form to the right of Riemann rarefaction data having ul = 0. We derive modulation equations for both wave patterns, using them to show that binary oscillations generated by the scheme are numerical artifacts, while computing an explicit solution for the ternary modulation equations. For positive initial data, the ternary modulation equations remain hyperbolic, while the solutions enter an elliptic region for data of both signs. Conditions under which solutions of the ternary modulation equations can be inverted to yield period-3 oscillations are also discussed." @default.
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- W1986016670 date "1998-09-01" @default.
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- W1986016670 title "Binary and ternary oscillations in a cubic numerical scheme" @default.
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- W1986016670 doi "https://doi.org/10.1016/s0167-2789(98)00090-6" @default.
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