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 study a 2- and a 4-dimensional nearly integrable symplectic maps using asingular perturbation method. Resonance island structures in the 2- and 4-dimensional maps are successfully obtained. Those perturbative results arenumerically confirmed.Comment: To appear in Prog. Theor. Phy

Analytical Expression for Low-Dimensional Resonance Islands in a 4-Dimensional Symplectic Map