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

The conifold singularities in the type-II string are considered as the pointsof phase transition. In some cases, these singularities can be understood inthe framework of the conventional fields theores as the points of enhancedgauge symmetry. We consider a class of three moduli Type-II strings. It isshown the periods can be written in the form of hypergeometric series aroundthe singular points in these models. The leading expansion around the conifoldlocus turns out to be described by Appell functions. In one singular point, weobserve the enhanced gauge symmetry of $SU(2)\times SU(2)$ independent of themodels. Around another conifold locus, however, the resulting expression of theAppell functions depends on the models. We examine the result by considering arelation between these Appell functions and underlying Riemann surfaces.Comment: 20 pages, Late

Enhanced Gauge Symmetry in Three-Modulus Models of Type II String and Hypergeometric Series