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

The finite terms Hylleraasand Kinoshita-type variational wave functions are considered for three-body systems. In the Coulombic case local properties of wave functions are restricted by the Kato’s cusp conditions. It is showed that Kato’s cusp conditions restrict the possible terms in variational calculations. Constraints for the linear expansion coefficients are also derived and a recursion-type solution is given. Two trial functions with correct cusp conditions are determined for the ground state of the He atom. Local and global properties of these wave function are studied through calculations of mean values, local energy, and quantities related to double photoionization.

Hylleraas- and Kinoshita-type wave functions with correct cusp conditions