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

We study various proofs of the caracterization of constant functions, moreprecisely of the theorem: a derivable function, defined on a real interval, isconstant if, and only if, its derivative is null. Our aim is to study therelationships of these proofs with the mathematical curriculum of secondaryschools and the begining of undergraduate studies in France, from various pointof views (epistemological, historical, didactical).

Fonction constante et d\'eriv\'ee nulle : un r\'esultat si trivial..