= Holonomic Weyl algebra module
{title2=$d(M)=n$}
A nonzero finitely generated <Weyl algebra> module over $A_n(\mathbb C)$ is holonomic when it attains the lower bound in the <Bernstein inequality for Weyl algebra modules>. The zero module is also conventionally called holonomic. Nonzero subquotients of a holonomic module remain holonomic. Additivity and integrality of the leading Hilbert-polynomial multiplicity then bound the number of nonzero factors in any submodule chain, giving finite composition length.
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