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# Singular Book 1.2.3 -- leading data

    i1 : A = QQ[x,y,z,MonomialOrder=>Lex];

    i2 : f = y^4*z^3+2*x^2*y^2*z^2+3*x^5+4*z^4+5*y^2

           5     2 2 2    4 3     2     4
    o2 = 3x  + 2x y z  + y z  + 5y  + 4z

    o2 : A

    i3 : leadMonomial f

          5
    o3 = x

    o3 : A

    i4 : exponents leadMonomial f

    o4 = {{5, 0, 0}}

    o4 : List

    i5 : leadTerm f

           5
    o5 = 3x

    o5 : A

    i6 : leadCoefficient f

    o6 = 3

    o6 : QQ

    i7 : someTerms(f,1,size f - 1)

           2 2 2    4 3     2     4
    o7 = 2x y z  + y z  + 5y  + 4z

    o7 : A

    i8 : someTerms(f,1,-1)

           2 2 2    4 3     2     4
    o8 = 2x y z  + y z  + 5y  + 4z

    o8 : A

The source of this document is in /build/macaulay2-88fgJW/macaulay2-1.25.11+ds/M2/Macaulay2/packages/Macaulay2Doc/M2-Singular-Book.m2:213:0.