Theorem ensymi

Description: Symmetry of equinumerosity. Theorem 2 of Suppes p. 92. (Contributed by NM, 25-Sep-2004)

	Ref	Expression
Hypothesis	ensymi.2	$$⊢A\approx B$$
Assertion	ensymi	$$⊢B\approx A$$

Proof

Step	Hyp	Ref	Expression
1		ensymi.2	$$⊢A\approx B$$
2		ensym	$$⊢A\approx B\to B\approx A$$
3	1 2	ax-mp	$$⊢B\approx A$$