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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 7184 | . 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 4909 | . . 3 ⊢ Ⅎ𝑥◡𝑅 |
| 6 | 2, 3, 5 | nfsup 7191 | . 2 ⊢ Ⅎ𝑥sup(𝐴, 𝐵, ◡𝑅) |
| 7 | 1, 6 | nfcxfr 2371 | 1 ⊢ Ⅎ𝑥inf(𝐴, 𝐵, 𝑅) |
| Colors of variables: wff set class |
| Syntax hints: Ⅎwnfc 2361 ◡ccnv 4724 supcsup 7181 infcinf 7182 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-rab 2519 df-v 2804 df-un 3204 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-cnv 4733 df-sup 7183 df-inf 7184 |
| This theorem is referenced by: (None) |
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