Singular Manual: Local orderings

| ### B.2.4 Local orderings For ls, ds, Ds and, if the weights are positive integers, also for ws and Ws, we have the localization of at the maximal ideal ls: negative lexicographical ordering: ds: negative degree reverse lexicographical ordering: Ds: negative degree lexicographical ordering: ws: (general) weighted reverse lexicographical ordering: a nonzero integer, any integer (including 0), is defined as `ds` but with Ws: (general) weighted lexicographical ordering: a nonzero integer, any integer (including 0), is defined as `Ds` but with

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