English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Let π : X →T be a small deformation of a normal Gorenstein surface singularity X 0 =π-1(0) over the complex number field ℂ.Suppose that T is a neighborhood of the origin of ℂ and thatX 0 is not log-canonical.We show that if a topological invariant-P  t ⋅ P  t  of X  t = π-1(t)  is constant, then, after a suitable finite base change,π admits a simultaneous resolution f : M → X which induces a locally trivial deformation of each maximal string of rational curves at an end of the exceptional set of M 0→ X 0;in particular, if X 0has a star-shaped resolution graph, then πadmits a weak simultaneous resolution (in other words, π isan equisingular deformation).

On (-P ? P)-constant deformations of Gorenstein surface singularities