| #### D.15.19.2 T2 Procedure from library `stanleyreisner.lib` (see stanleyreisner_lib). Usage: T2(h); h = ideal. Assume: I is the ideal generated by the monomials w.r.t. faces. Return: second order deformation on ideal I. Theory: The procedure will compute the second order deformaiton. Example:
    LIB "stanleyreisner.lib";
    ring R=0,(x(1..4)),lp;
    ideal i=x(1),x(2),x(3),x(4),x(1)*x(4),x(2)*x(4),x(1)*x(3),x(2)*x(3);
    list L=T2(i);
    L;
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    ==>    phi.relations  ->  phi.over/phi.source
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    ==>    phi.relations  ->  phi.over/phi.source
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    ==>    phi.relations  ->  phi.over/phi.source
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User manual for Singular version 4.3.2, 2023, generated by texi2html.