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Metamath Proof Explorer

Theorem suceq

Description: Equality of successors. (Contributed by NM, 30-Aug-1993) (Proof shortened by Andrew Salmon, 25-Jul-2011)

		Ref	Expression
	Assertion	suceq	$⊢ A = B \to suc A = suc B$

Step	Hyp	Ref	Expression
1		id	$⊢ A = B \to A = B$
2	1	suceqd	$⊢ A = B \to suc A = suc B$