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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 6299 | . 2 ⊢ Pred(𝑅, 𝐴, 𝑋) = (𝐴 ∩ (◡𝑅 “ {𝑋})) | |
| 2 | nfpred.2 | . . 3 ⊢ Ⅎ𝑥𝐴 | |
| 3 | nfpred.1 | . . . . 5 ⊢ Ⅎ𝑥𝑅 | |
| 4 | 3 | nfcnv 5858 | . . . 4 ⊢ Ⅎ𝑥◡𝑅 |
| 5 | nfpred.3 | . . . . 5 ⊢ Ⅎ𝑥𝑋 | |
| 6 | 5 | nfsn 4668 | . . . 4 ⊢ Ⅎ𝑥{𝑋} |
| 7 | 4, 6 | nfima 6064 | . . 3 ⊢ Ⅎ𝑥(◡𝑅 “ {𝑋}) |
| 8 | 2, 7 | nfin 4170 | . 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 3898 {csn 4584 ◡ccnv 5654 “ cima 5658 Predcpred 6298 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5104 df-opab 5168 df-xp 5661 df-cnv 5663 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 |
| This theorem is used by: nffrecs 8282 nfwsuc 36395 nfwlim 36399 |
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