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| Mirrors > Home > MPE Home > Th. List > nfpred | Structured version Visualization version GIF version | ||
| Description: Bound-variable hypothesis builder for the predecessor class. (Contributed by Scott Fenton, 9-Jun-2018.) |
| Ref | Expression |
|---|---|
| nfpred.1 | ⊢ Ⅎ𝑥𝑅 |
| nfpred.2 | ⊢ Ⅎ𝑥𝐴 |
| nfpred.3 | ⊢ Ⅎ𝑥𝑋 |
| Ref | Expression |
|---|---|
| nfpred | ⊢ Ⅎ𝑥Pred(𝑅, 𝐴, 𝑋) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-pred 6307 | . 2 ⊢ Pred(𝑅, 𝐴, 𝑋) = (𝐴 ∩ (◡𝑅 “ {𝑋})) | |
| 2 | nfpred.2 | . . 3 ⊢ Ⅎ𝑥𝐴 | |
| 3 | nfpred.1 | . . . . 5 ⊢ Ⅎ𝑥𝑅 | |
| 4 | 3 | nfcnv 5857 | . . . 4 ⊢ Ⅎ𝑥◡𝑅 |
| 5 | nfpred.3 | . . . . 5 ⊢ Ⅎ𝑥𝑋 | |
| 6 | 5 | nfsn 4664 | . . . 4 ⊢ Ⅎ𝑥{𝑋} |
| 7 | 4, 6 | nfima 6066 | . . 3 ⊢ Ⅎ𝑥(◡𝑅 “ {𝑋}) |
| 8 | 2, 7 | nfin 4120 | . 2 ⊢ Ⅎ𝑥(𝐴 ∩ (◡𝑅 “ {𝑋})) |
| 9 | 1, 8 | nfcxfr 2920 | 1 ⊢ Ⅎ𝑥Pred(𝑅, 𝐴, 𝑋) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: Ⅎwnfc 2907 ∩ cin 4088 {csn 4584 ◡ccnv 5650 “ cima 5654 Predcpred 6306 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-rab 3413 df-v 3452 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-opab 5167 df-xp 5657 df-cnv 5659 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6307 |
| This theorem is used by: nffrecs 8309 nfwsuc 36704 nfwlim 36708 |
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