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inducer / grudge

Grand Unified Discontinuous Galerkin Environment? A DG code in training.
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Support more vector norms? #357

Closed nkoskelo closed 1 month ago

nkoskelo commented 1 month ago

Currently, the operator,grudge.op.norm = grudge.reductions.norm is specified as returning "the vector norm of a function represented by its vector of degrees of freedom." However, only the 2-norm and the infinity norms are supported. Should we generalize the function to support all integral "p-norms"?

inducer commented 1 month ago

I don't see the need. The 1-norm is the only other mainstream norm that's missing/would be practically relevant, but its integrand is non-smooth at the zero crossings , so we cannot accurately approximate it. I don't foresee anyone urgently needing a 4-norm.