Lattice Diagram polynomials in one set of variables

The space $M_{μ/i,j}$ spanned by all partial derivatives of the lattice polynomial $Δ_{μ/i,j}(X;Y)$ is investigated in math.CO/9809126 and many conjectures are given. Here, we prove all these conjectures for the $Y$-free component $M_{μ/i,j}^0$ of $M_{μ/i,j}$. In particular, we give an explicit bases for $M_{μ/i,j}^0$ which allow us to prove directly the central {\sl four term recurrence} for these spaces.

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