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Metamath Proof Explorer


Theorem eqimssd

Description: Equality implies inclusion, deduction version. (Contributed by SN, 6-Nov-2024)

Ref Expression
Hypothesis eqimssd.1 φ A = B
Assertion eqimssd φ A B

Proof

Step Hyp Ref Expression
1 eqimssd.1 φ A = B
2 ssid B B
3 1 2 eqsstrdi φ A B