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 1966, Semenov, by using a technique based on power series, suggested analgorithm that tells apart the languages described by an unambiguous grammarand a DFA. At the first glance, it may appear that the algorithm can be easilymodified to yield a full solution of the equivalence problem for unambiguousgrammars. This article shows why this hunch is, in fact, incorrect.

Why the equivalence problem for unambiguous grammars has not been solved back in 1966?