Proof of the independence of the primitive symbols of Heyting's calculus of propositions

Mckinsey, J. C. C.

Proof of the independence of the primitive symbols of Heyting's calculus of propositions

The journal of symbolic logic. Vol. 4, Nº 4 December, 1939.


Heyting, Arend, 1898-1980
Logica Matematica
Calculo