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Mirrors > Home > ILE Home > Th. List > eleq2s | GIF version |
Description: Substitution of equal classes into a membership antecedent. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) |
Ref | Expression |
---|---|
eleq2s.1 | ⊢ (𝐴 ∈ 𝐵 → 𝜑) |
eleq2s.2 | ⊢ 𝐶 = 𝐵 |
Ref | Expression |
---|---|
eleq2s | ⊢ (𝐴 ∈ 𝐶 → 𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eleq2s.2 | . . 3 ⊢ 𝐶 = 𝐵 | |
2 | 1 | eleq2i 2145 | . 2 ⊢ (𝐴 ∈ 𝐶 ↔ 𝐴 ∈ 𝐵) |
3 | eleq2s.1 | . 2 ⊢ (𝐴 ∈ 𝐵 → 𝜑) | |
4 | 2, 3 | sylbi 119 | 1 ⊢ (𝐴 ∈ 𝐶 → 𝜑) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1284 ∈ wcel 1433 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-5 1376 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-4 1440 ax-17 1459 ax-ial 1467 ax-ext 2063 |
This theorem depends on definitions: df-bi 115 df-cleq 2074 df-clel 2077 |
This theorem is referenced by: elrabi 2746 opelopabsb 4015 epelg 4045 reg3exmidlemwe 4321 elxpi 4379 optocl 4434 fvmptss2 5268 fvmptssdm 5276 acexmidlemcase 5527 elmpt2cl 5718 mpt2xopn0yelv 5877 tfr2a 5959 2oconcl 6045 ecexr 6134 ectocld 6195 ecoptocl 6216 eroveu 6220 diffitest 6371 en2eqpr 6380 dmaddpqlem 6567 nqpi 6568 nq0nn 6632 0nsr 6926 axaddcl 7032 axmulcl 7034 peano2uzs 8672 fzossnn0 9184 rebtwn2zlemstep 9261 fldiv4p1lem1div2 9307 frecfzennn 9419 facnn 9654 bcpasc 9693 rexuz3 9876 rexanuz2 9877 r19.2uz 9879 cau4 10002 caubnd2 10003 climshft2 10145 climaddc1 10167 climmulc2 10169 climsubc1 10170 climsubc2 10171 climlec2 10179 climcau 10184 climcaucn 10188 infssuzex 10345 infssuzledc 10346 3prm 10510 |
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