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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We build a combinatorial invariant, called the spectral monodromy from thespectrum of a non-selfadjoint h -pseudodifferential operator with two degreesof freedom in the semi-classical limit. We treat small non-selfadjointperturbation of selfadjoint h-pseudodifferential operators in two case: in thefirst, we assume that the classical flow of the unperturbed part is integrable;the second case, more interesting, when this flow is assumed to bequasi-integrable.

Spectral monodromy of small non-selfadjoint perturbed operators: completely integrable or quasi-integrable case