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 Loc 551#551 = 565#565, the localization of 551#551at the maximal ideal 566#566. ls: negative lexicographical ordering: 567#567. ds: negative degree reverse lexicographical ordering: let 555#555 then 568#568 or 558#558 and 559#559 Ds: negative degree lexicographical ordering: let 555#555 then 568#568 or 558#558 and 560#560 ws: (general) weighted reverse lexicographical ordering: 569#569 a nonzero integer, 570#570 any integer (including 0), is defined as `ds` but with 563#563 Ws: (general) weighted lexicographical ordering: 571#571 a nonzero integer, 570#570 any integer (including 0), is defined as `Ds` but with 563#563

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