Singular Manual: makeSheaf

| #### D.5.17.9 makeSheaf Procedure from library `schubert.lib` (see schubert_lib). Usage: makeSheaf(V,ch); V variety, ch poly Return: sheaf Theory: create a sheaf on an abstract variety, and its Chern character is the polynomial ch. Example:
    LIB "schubert.lib";
    variety X;
    X.dimension = 4;
    ring r = 0,(c(1..2),d(1..3)),wp(1..2,1..3);
    setring r;
    X.baseRing = r;
    poly c = 1 + c(1) + c(2);
    poly ch = 2 + logg(c,4);
    sheaf S = makeSheaf(X,ch);
    S;
    ==> A sheaf of rank  2
    ==>
See also: printSheaf; rankSheaf.

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