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8
votes
1
answer
364
views
Forcing in Constructive Set Theories
I searched on the internet, but I could not find anything useful about applications of forcing in constructive set theories.
Are there any developments of forcing in CZF or IZF?
Thanks in advance.
12
votes
1
answer
689
views
Intutionistic Robinson Arithmetic
By Friedman translation $HA$ and $PA$ prove the same $\Pi_2$ formulas.
Is it true for Intutionistic Robinson arithmetic(Robinson axioms with intutionistic logic) and classic Robinson arithmetic?
Axiom …