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 examine the constraints and the reality conditions that have to be imposedin the canonical theory of 4--d gravity formulated in terms of Ashtekarvariables. We find that the polynomial reality conditions are consistent withthe constraints, and make the theory equivalent to Einstein's, as long as theinverse metric is not degenerate; when it is degenerate, reality conditionscannot be consistently imposed in general, and the theory describes complexgeneral relativity.Comment: 11

The reality conditions for the new canonical variables of general relativity