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

Several letters by Kurt G\"odel and Johann (J\'anos) von Neumann from the (sofar uncatalogued) archive of Abraham (Adolf) Fraenkel at the National Libraryof Israel are published and discussed. These include two fragments by G\"odelof special interest, since they concern the relationship between G\"odel'sincompleteness theorem and work by Herbrand, Presburger, and Zermelo, as wellas a long letter from von Neumann from 1923 explaining his own approach to theaxiomatization of set theory.

Some Unpublished Letters by G\"odel and von Neumann in the Fraenkel Archive