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Changelog. A lot less detailed than usual, at least for past
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history.
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2006/11/30: Fixed a bug in raw aggregation. Note: raw aggregation
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gives different results from smoothed with omega=0.0,
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because in the latter we have explicitly stored zero
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coefficients that would be absent in the first, thus
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generating different ILU factorizations.
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2006/11/28: Merged the mods for descriptors of large index spaces to
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avoid having the GLOB_TO_LOC array. Took the chance to
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reorganize the descriptor build routines and define some
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access functions for decsriptor features and entries, so
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access functions for descriptor features and entries, so
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as not to use the descriptor components directly. Tested
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with AS, 2- and 3- level Post smoothers.
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