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

In 1929 B.~N.~Delaunay proved that there are exactly 5 types of coincidenceof parallelohedra at faces of codimension 3. We give a combinatorial proof ofthis theorem and prove several additional statements on three-codimensionalfaces of parallelohedral tiling.  --  The original paper appeared in 2013 in MAIS (see the bibref) and was inRussian. This is the English version.

On Delaunay's classification theorem on faces of parallelohedra of codimension three