Some remarks on limit mixed Hodge structures and spectrum

Abstract

In this note we clarify some subtle points on the limit mixed Hodge structures and on the spectrum. These are more or less well-known to the specialists, but do not seem to be stated explicitly in the literature. However, as they do not seem to be obvious to the beginners, we consider them to be worth writing down explicitly. The general constructions are exemplified by considering the isolated (weighted) homogeneous singularities in detail.

Keywords

• limit mixed hodge structure
• monodromy
• milnor fiber
• spectrum
• primary 14d07, 32s35
• secondary 14f05, 32s40