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

Conformal block is a function of many variables, usually represented as aformal series, with coefficients which are certain matrix elements in thechiral (e.g. Virasoro) algebra. Non-perturbative conformal block is amulti-valued function, defined globally over the space of dimensions, with manybranches and, perhaps, additional free parameters, not seen at the perturbativelevel. We discuss additional complications of non-perturbative description,caused by the fact that all the best studied examples of conformal blocks lieat the singularity locus in the moduli space (at divisors of the coefficientsor, simply, at zeroes of the Kac determinant). A typical example is theAshkin-Teller point, where at least two naive non-perturbative expressions areprovided by elliptic Dotsenko-Fateev integral and by the celebratedZamolodchikov formula in terms of theta-constants, and they are different. Thesituation is somewhat similar at the Ising and other minimal model points.

Matching branches of non-perturbative conformal block at its singularity divisor