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| Mirrors > Home > ILE Home > Th. List > rspceeqv | GIF version | ||
| Description: Restricted existential specialization in an equality, using implicit substitution. (Contributed by BJ, 2-Sep-2022.) |
| Ref | Expression |
|---|---|
| rspceeqv.1 | ⊢ (𝑥 = 𝐴 → 𝐶 = 𝐷) |
| Ref | Expression |
|---|---|
| rspceeqv | ⊢ ((𝐴 ∈ 𝐵 ∧ 𝐸 = 𝐷) → ∃𝑥 ∈ 𝐵 𝐸 = 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rspceeqv.1 | . . 3 ⊢ (𝑥 = 𝐴 → 𝐶 = 𝐷) | |
| 2 | 1 | eqeq2d 2250 | . 2 ⊢ (𝑥 = 𝐴 → (𝐸 = 𝐶 ↔ 𝐸 = 𝐷)) |
| 3 | 2 | rspcev 2929 | 1 ⊢ ((𝐴 ∈ 𝐵 ∧ 𝐸 = 𝐷) → ∃𝑥 ∈ 𝐵 𝐸 = 𝐶) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 = wceq 1402 ∈ wcel 2209 ∃wrex 2529 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-rex 2534 df-v 2823 |
| This theorem is used by: elixpsn 7011 ixpsnf1o 7012 elfir 7301 0ct 7441 ctmlemr 7442 ctssdclemn0 7444 fodju0 7481 ccats1pfxeqrex 11470 mertenslemi1 12285 mertenslem2 12286 nninfctlemfo 12800 pcprmpw 13096 1arithlem4 13128 ctiunctlemfo 13313 elrestr 13584 lss1d 14703 lspsn 14736 znf1o 14969 restopnb 15265 mopnex 15589 metrest 15590 mpodvdsmulf1o 16087 lgsquadlem1 16179 2sqlem2 16217 mul2sq 16218 2sqlem3 16219 2sqlem9 16226 2sqlem10 16227 nnnninfex 17040 |
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