| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > cbvral | GIF version | ||
| Description: Rule used to change bound variables, using implicit substitution. (Contributed by NM, 31-Jul-2003.) |
| Ref | Expression |
|---|---|
| cbvral.1 | ⊢ Ⅎ𝑦𝜑 |
| cbvral.2 | ⊢ Ⅎ𝑥𝜓 |
| cbvral.3 | ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜓)) |
| Ref | Expression |
|---|---|
| cbvral | ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑦 ∈ 𝐴 𝜓) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nfcv 2384 | . 2 ⊢ Ⅎ𝑥𝐴 | |
| 2 | nfcv 2384 | . 2 ⊢ Ⅎ𝑦𝐴 | |
| 3 | cbvral.1 | . 2 ⊢ Ⅎ𝑦𝜑 | |
| 4 | cbvral.2 | . 2 ⊢ Ⅎ𝑥𝜓 | |
| 5 | cbvral.3 | . 2 ⊢ (𝑥 = 𝑦 → (𝜑 ↔ 𝜓)) | |
| 6 | 1, 2, 3, 4, 5 | cbvralf 2768 | 1 ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑦 ∈ 𝐴 𝜓) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 Ⅎwnf 1509 ∀wral 2520 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-sb 1812 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 |
| This theorem is referenced by: cbvralv 2777 cbvralsv 2793 cbviin 4028 frind 4472 ralxpf 4900 eqfnfv2f 5778 ralrnmpt 5818 dff13f 5942 ofrfval2 6282 uchoice 6330 fmpox 6395 cbvixp 6949 mptelixpg 6968 xpf1o 7096 indstr 9921 fsum3 12066 fsum00 12141 mertenslem2 12215 fprodcl2lem 12284 fprodle 12319 ctiunctal 13181 cnmpt11 15135 cnmpt21 15143 bj-bdfindes 16706 bj-findes 16738 |
| Copyright terms: Public domain | W3C validator |