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| Mirrors > Home > MPE Home > Th. List > fiinfcl | Structured version Visualization version GIF version | ||
| Description: A nonempty finite set contains its infimum. (Contributed by AV, 3-Sep-2020.) |
| Ref | Expression |
|---|---|
| fiinfcl | ⊢ ((𝑅 Or 𝐴 ∧ (𝐵 ∈ Fin ∧ 𝐵 ≠ ∅ ∧ 𝐵 ⊆ 𝐴)) → inf(𝐵, 𝐴, 𝑅) ∈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-inf 9347 | . 2 ⊢ inf(𝐵, 𝐴, 𝑅) = sup(𝐵, 𝐴, ◡𝑅) | |
| 2 | cnvso 6244 | . . 3 ⊢ (𝑅 Or 𝐴 ↔ ◡𝑅 Or 𝐴) | |
| 3 | fisupcl 9374 | . . 3 ⊢ ((◡𝑅 Or 𝐴 ∧ (𝐵 ∈ Fin ∧ 𝐵 ≠ ∅ ∧ 𝐵 ⊆ 𝐴)) → sup(𝐵, 𝐴, ◡𝑅) ∈ 𝐵) | |
| 4 | 2, 3 | sylanb 582 | . 2 ⊢ ((𝑅 Or 𝐴 ∧ (𝐵 ∈ Fin ∧ 𝐵 ≠ ∅ ∧ 𝐵 ⊆ 𝐴)) → sup(𝐵, 𝐴, ◡𝑅) ∈ 𝐵) |
| 5 | 1, 4 | eqeltrid 2841 | 1 ⊢ ((𝑅 Or 𝐴 ∧ (𝐵 ∈ Fin ∧ 𝐵 ≠ ∅ ∧ 𝐵 ⊆ 𝐴)) → inf(𝐵, 𝐴, 𝑅) ∈ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1087 ∈ wcel 2114 ≠ wne 2933 ⊆ wss 3890 ∅c0 4274 Or wor 5529 ◡ccnv 5621 Fincfn 8884 supcsup 9344 infcinf 9345 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pr 5368 ax-un 7680 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-tr 5194 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7315 df-om 7809 df-en 8885 df-fin 8888 df-sup 9346 df-inf 9347 |
| This theorem is referenced by: infltoreq 9408 aalioulem2 26281 ballotlemiex 34652 ptrecube 37932 heicant 37967 aks4d1p4 42510 aks4d1p7 42514 sticksstones1 42577 cnrefiisplem 46261 fourierdlem42 46581 ioorrnopnlem 46736 hoidmvlelem2 47028 iunhoiioolem 47107 vonioolem1 47112 prmdvdsfmtnof1lem1 48018 prmdvdsfmtnof 48020 |
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