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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We describe a Picard-Vessiot theory for differential fields with nonalgebraically closed fields of constants. As a technique for constructing andclassifying Picard-Vessiot extensions, we develop a Galois descent theory. Weutilize this theory to prove that every linear algebraic group $G$ over$\mathbb{R}$ occurs as a differential Galois group over $\mathbb{R}(z)$. Themain ingredient of the proof is the Riemann-Hilbert correspondence for regularsingular differential equations over $\mathbb{C}(z)$.

The inverse problem of differential Galois theory over the field R(z)