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

We study the initial boundary value problem of the nonlinear Klein-Gordonequation. First we introduce a family of potential wells. By using them, we obtain anew existence theorem of global solutions and show the blow-up in finite time of solutions.Especially the relation between the above two phenomena is derived as a sharp condition

Sharp Condition for Global Existence and Blow-Up on Klein-Gordon Equation