Relative \v{C}ech-Dolbeault homology and applications

TL;DR

This paper introduces a new approach to relative Dolbeault homology using ech techniques, proves its equivalence with existing cohomology, and applies it to compare manifolds and analyze blow-ups.

Contribution

It defines relative Dolbeault homology via ech methods, establishes its equivalence with known cohomology, and applies these results to manifold comparisons and blow-up analysis.

Findings

Established equivalence between relative Dolbeault homology and ech-Dolbeault cohomology.

Provided a method to compare cohomology groups of related complex manifolds.

Applied the framework to study blow-up transformations.

Abstract

We define the relative Dolbeault homology of a complex manifold with currents via a \v{C}ech approach and we prove its equivalence with the relative \v{C}ech-Dolbeault cohomology as defined in [T. Suwa, \v{C}ech-Dolbeault cohomology and the $\overline\partial$-Thom class, {\em Singularities---Niigata---Toyama 2007}, 321--340, Adv. Stud. Pure Math., \textbf{56}, Math. Soc. Japan, Tokyo, 2009. ]. This definition is then used to compare the relative Dolbeault cohomology groups of two complex manifolds of the same dimension related by a suitable proper surjective holomorphic map. Finally, an application to blow-ups is considered.