Algebra Structure on Minimal Resolutions of Gorenstein Rings of Embedding Codimension Four.
Classification of the Tor-Algebras of Codimension Four Gorenstein Local Rings
A General Resolution for Grade Four Gorenstein Ideals.
Equivalence classes of Latin squares and nets in
The fundamental combinatorial structure of a net in is its associated set of mutually orthogonal Latin squares. We define equivalence classes of sets of orthogonal Latin squares by label equivalences of the lines of the corresponding net in . Then we count these equivalence classes for small cases. Finally we prove that the realization spaces of these classes in are empty to show some non-existence results for 4-nets in .
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