| #### 7.10.6.1 ncInit Procedure from library `ncrat.lib` (see ncrat_lib). Usage: ncInit(vars); list vars containing strings Return: datatypes ncrat and ncrep (and token, tokenstream, but they are not meant for users), sets ring as 'NCRING' with nc variables from list l Example:
    LIB "ncrat.lib";
    ncInit(list("x", "y", "z"));
    NCRING;
    ==> // coefficients: QQ[I]/(I^2+1) considered as a field
    ==> // number of vars : 3
    ==> //        block   1 : ordering dp
    ==> //                  : names    x y z
    ==> //        block   2 : ordering C

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