Determinantal ideal are one of important topics in Algebraic Geometry and Commutative Algebra. There are several examples of varieties as rational normal scrolls which their defining ideals are generated by minors of a matrix. In general, computing a Grobner bases for a special class of ideals help us to correspond a monomial ideal to the main ideals with the same invariants. In this paper, we compute a Grobner bases for an ideal generated by 2-minors of a 2×n matrix of monomials. Also height of determinantal ideal of a special class of monomial matrices is computed.

Keywords: Determinantal ideal, Grobner bases, height of ideal, monomial

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