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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 9416 | . 2 ⊢ inf(𝐵, 𝐴, 𝑅) = sup(𝐵, 𝐴, ◡𝑅) | |
| 2 | cnvso 6290 | . . 3 ⊢ (𝑅 Or 𝐴 ↔ ◡𝑅 Or 𝐴) | |
| 3 | fisupcl 9443 | . . 3 ⊢ ((◡𝑅 Or 𝐴 ∧ (𝐵 ∈ Fin ∧ 𝐵 ≠ ∅ ∧ 𝐵 ⊆ 𝐴)) → sup(𝐵, 𝐴, ◡𝑅) ∈ 𝐵) | |
| 4 | 2, 3 | sylanb 593 | . 2 ⊢ ((𝑅 Or 𝐴 ∧ (𝐵 ∈ Fin ∧ 𝐵 ≠ ∅ ∧ 𝐵 ⊆ 𝐴)) → sup(𝐵, 𝐴, ◡𝑅) ∈ 𝐵) |
| 5 | 1, 4 | eqeltrid 2866 | 1 ⊢ ((𝑅 Or 𝐴 ∧ (𝐵 ∈ Fin ∧ 𝐵 ≠ ∅ ∧ 𝐵 ⊆ 𝐴)) → inf(𝐵, 𝐴, 𝑅) ∈ 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∧ w3a 1103 ∈ wcel 2145 ≠ wne 2957 ⊆ wss 3902 ∅c0 4282 Or wor 5566 ◡ccnv 5658 Fincfn 8955 supcsup 9413 infcinf 9414 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pr 5402 ax-un 7739 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7373 df-om 7866 df-en 8956 df-fin 8959 df-sup 9415 df-inf 9416 |
| This theorem is used by: infltoreq 9477 aalioulem2 26566 ballotlemiex 35000 ptrecube 38356 heicant 38391 aks4d1p4 42932 aks4d1p7 42936 sticksstones1 42999 cnrefiisplem 46644 fourierdlem42 46964 ioorrnopnlem 47119 hoidmvlelem2 47411 iunhoiioolem 47490 vonioolem1 47495 prmdvdsfmtnof1lem1 48474 prmdvdsfmtnof 48476 |
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