Description: Equality implies inclusion, deduction version. (Contributed by SN, 15-Feb-2025)
Ref | Expression | ||
---|---|---|---|
Hypothesis | eqimssd.1 | ⊢ ( 𝜑 → 𝐴 = 𝐵 ) | |
Assertion | eqimsscd | ⊢ ( 𝜑 → 𝐵 ⊆ 𝐴 ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqimssd.1 | ⊢ ( 𝜑 → 𝐴 = 𝐵 ) | |
2 | ssid | ⊢ 𝐴 ⊆ 𝐴 | |
3 | 1 2 | eqsstrrdi | ⊢ ( 𝜑 → 𝐵 ⊆ 𝐴 ) |