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Mirrors > Home > MPE Home > Th. List > eleqtrri | Structured version Visualization version GIF version |
Description: Substitution of equal classes into membership relation. (Contributed by NM, 15-Jul-1993.) |
Ref | Expression |
---|---|
eleqtrri.1 | ⊢ 𝐴 ∈ 𝐵 |
eleqtrri.2 | ⊢ 𝐶 = 𝐵 |
Ref | Expression |
---|---|
eleqtrri | ⊢ 𝐴 ∈ 𝐶 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eleqtrri.1 | . 2 ⊢ 𝐴 ∈ 𝐵 | |
2 | eleqtrri.2 | . . 3 ⊢ 𝐶 = 𝐵 | |
3 | 2 | eqcomi 2748 | . 2 ⊢ 𝐵 = 𝐶 |
4 | 1, 3 | eleqtri 2838 | 1 ⊢ 𝐴 ∈ 𝐶 |
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