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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 6962 | . 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 4790 | . . 3 ⊢ Ⅎ𝑥◡𝑅 |
6 | 2, 3, 5 | nfsup 6969 | . 2 ⊢ Ⅎ𝑥sup(𝐴, 𝐵, ◡𝑅) |
7 | 1, 6 | nfcxfr 2309 | 1 ⊢ Ⅎ𝑥inf(𝐴, 𝐵, 𝑅) |
Colors of variables: wff set class |
Syntax hints: Ⅎwnfc 2299 ◡ccnv 4610 supcsup 6959 infcinf 6960 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-ext 2152 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ral 2453 df-rex 2454 df-rab 2457 df-v 2732 df-un 3125 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-br 3990 df-opab 4051 df-cnv 4619 df-sup 6961 df-inf 6962 |
This theorem is referenced by: (None) |
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