A corollary of the b-function lemma.

Let X be an algebraic variety, f a regular function, $${j:U\hookrightarrow X}$$ the complement to the locus of vanishing of f, and M a holonomic D-module on U. Consider the D[ s]-module $${M\otimes ``{f^{s}}''}$$ . The goal of this note is to describe all D[ s] submodules $${N\hookrightarrow j_*(M\otimes ``{f^{s}}'')}$$ such that $${j^*(N)\simeq M\otimes ``{f^{s}}''}$$ . [ABSTRACT FROM AUTHOR]