253     const ring myR;
260       myR(R),  in XelMatImpl()
267     return myR;  in myRing()
287     if (i+j == myDim-1) return one(myR);  in myEntry()
288     return zero(myR);  in myEntry()
366     return new XelMatImpl(myR, myDim);  in myClone()
412     const ring myR;
421       myR(R),  in RevLexMatImpl()
423       myMinusOne(myR,-1)  in RevLexMatImpl()
429     return myR;  in myRing()
450     return zero(myR);  in myEntry()
529     return new RevLexMatImpl(myR, myDim);  in myClone()
575     const ring myR;
583       myR(R),  in StdDegLexMatImpl()
590     return myR;  in myRing()
610     if (i == 0 || i == j+1) return one(myR);  in myEntry()
611     return zero(myR);  in myEntry()
697     return new StdDegLexMatImpl(myR, myDim);  in myClone()
743     const ring myR;
752       myR(R),  in StdDegRevLexMatImpl()
760     return myR;  in myRing()
783     if (i == 0) return one(myR);  in myEntry()
785     return zero(myR);  in myEntry()
878     return new StdDegRevLexMatImpl(myR, myDim);  in myClone()