Level Algebras of Type 2
نویسنده
چکیده
In this paper we study standard graded artinian level algebras, in particular those whose socle-vector has type 2. Our main results are: the characterization of the level h-vectors of the form (1, r, ..., r, 2) for r ≤ 4; the characterization of the minimal free resolutions associated to each of the h-vectors above when r = 3; a sharp upper-bound (under certain mild hypotheses) for the level h-vectors (1, r, ..., a, 2) of arbitrary codimension r and type 2, which depends on the next to last entry a.
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