On a complex manifold, the embedding of the category of regular holonomic D-modules into that of holonomic D-modules has a left quasi-inverse functor $\mathcal{ M}\mapsto\mathcal{ M}_{ \mathrm{ reg}}$, called regularization. Recall that $\mathcal{ M}_{ \mathrm{ reg}}$ is reconstructed from the de Rham complex of $\mathcal{ M}$ by the regular Riemann-Hilbert correspondence. Similarly, on a topological space, the embedding of sheaves into enhanced ind-sheaves has a left quasi-inverse functor, called here sheafification. Regularization and sheafification are intertwined by the irregular Riemann-Hilbert correspondence. Here, we study some of their properties. In particular, we provide a germ formula for the sheafification of enhanced specialization and microlocalization.
Categories: math.AG