Disambiguation evidence for Zermelo–Fraenkel set theory via surface form

"Zermelo–Fraenkel set theory (indirectly)"


As object (1)

Triples where some other subject referred to this entity as "Zermelo–Fraenkel set theory (indirectly)".

Frege’s system in "Grundgesetze der Arithmetik" influenced
"Zermelo–Fraenkel set theory (indirectly)"