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### `p_terms`

`p_terms(poly,vlist,order)`
  :: Monomials appearing in the given polynomial is collected into a list.

return
  list
poly
  polynomial
vlist
  list
order
  number, list or matrix

- Defined in the package ``gr'`.
- This returns a list which contains all non-zero monomials in the given polynomial. The monomials are ordered according to the current type of term ordering and vlist.
- Since polynomials in a Groebner base often have very large coefficients, examining a polynomial as it is may sometimes be difficult to perform. For such a case, this function enables to examine which term is really exists.

    [233] G=gr(katsura(5),[u5,u4,u3,u2,u1,u0],2)$
    [234] p_terms(G[0],[u5,u4,u3,u2,u1,u0],2);
    [u5,u0^31,u0^30,u0^29,u0^28,u0^27,u0^26,u0^25,u0^24,u0^23,u0^22,u0^21,u0^20,
    u0^19,u0^18,u0^17,u0^16,u0^15,u0^14,u0^13,u0^12,u0^11,u0^10,u0^9,u0^8,u0^7,
    u0^6,u0^5,u0^4,u0^3,u0^2,u0,1]

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