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- W2034626863 abstract "We present a spectral mimetic least-squares method for a model diffusion–reaction problem, which preserves key conservation properties of the continuum problem. Casting the model problem into a first-order system for two scalar and two vector variables shifts material properties from the differential equations to a pair of constitutive relations. We use this system to motivate a new least-squares functional involving all four fields and show that its minimizer satisfies the differential equations exactly. Discretization of the four-field least-squares functional by spectral spaces compatible with the differential operators leads to a least-squares method in which the differential equations are also satisfied exactly. Moreover, the latter are reduced to purely topological relationships for the degrees of freedom that can be satisfied without reference to basis functions. Numerical experiments confirm the spectral accuracy of the method and its local conservation." @default.
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- W2034626863 date "2014-12-01" @default.
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- W2034626863 title "A spectral mimetic least-squares method" @default.
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- W2034626863 doi "https://doi.org/10.1016/j.camwa.2014.09.014" @default.
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