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/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

The existence of global small O(") solutions to quadratically non- linear wave equations in three space dimensions under the null condition is shown to be stable under the simultaneous addition of small O(⌫) viscous dis- sipation and O() non-null quadratic nonlinearities, provided that "/⌫ ⌧ 1. When this condition is not met, small solutions exist "almost globally", and in certain parameter ranges, the addition of dissipation enhances the lifespan. 1. Introduction. We shall be concerned with the nonlinear PDE @ 2 t ' ' ⌫@t' = 3 X

Global and almost global existence of small solutions to a dissipative wave equation in 3D with nearly null nonlinear terms