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| Mirrors > Home > ILE Home > Th. List > nfinf | GIF version | ||
| Description: Hypothesis builder for infimum. (Contributed by AV, 2-Sep-2020.) |
| Ref | Expression |
|---|---|
| nfinf.1 | ⊢ Ⅎ𝑥𝐴 |
| nfinf.2 | ⊢ Ⅎ𝑥𝐵 |
| nfinf.3 | ⊢ Ⅎ𝑥𝑅 |
| Ref | Expression |
|---|---|
| nfinf | ⊢ Ⅎ𝑥inf(𝐴, 𝐵, 𝑅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-inf 7319 | . 2 ⊢ inf(𝐴, 𝐵, 𝑅) = sup(𝐴, 𝐵, ◡𝑅) | |
| 2 | nfinf.1 | . . 3 ⊢ Ⅎ𝑥𝐴 | |
| 3 | nfinf.2 | . . 3 ⊢ Ⅎ𝑥𝐵 | |
| 4 | nfinf.3 | . . . 4 ⊢ Ⅎ𝑥𝑅 | |
| 5 | 4 | nfcnv 4957 | . . 3 ⊢ Ⅎ𝑥◡𝑅 |
| 6 | 2, 3, 5 | nfsup 7326 | . 2 ⊢ Ⅎ𝑥sup(𝐴, 𝐵, ◡𝑅) |
| 7 | 1, 6 | nfcxfr 2389 | 1 ⊢ Ⅎ𝑥inf(𝐴, 𝐵, 𝑅) |
| Colors of variables: wff set class |
| Syntax hints: Ⅎwnfc 2379 ◡ccnv 4771 supcsup 7316 infcinf 7317 |
| 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-in1 623 ax-in2 624 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 theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-un 3224 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-br 4129 df-opab 4191 df-cnv 4780 df-sup 7318 df-inf 7319 |
| This theorem is referenced by: (None) |
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