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Mirrors > Home > MPE Home > Th. List > suprzcl2 | Structured version Visualization version GIF version |
Description: The supremum of a bounded-above set of integers is a member of the set. (This version of suprzcl 12705 avoids ax-pre-sup 11240.) (Contributed by Mario Carneiro, 21-Apr-2015.) (Revised by Mario Carneiro, 24-Dec-2016.) |
Ref | Expression |
---|---|
suprzcl2 | ⊢ ((𝐴 ⊆ ℤ ∧ 𝐴 ≠ ∅ ∧ ∃𝑥 ∈ ℤ ∀𝑦 ∈ 𝐴 𝑦 ≤ 𝑥) → sup(𝐴, ℝ, < ) ∈ 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zsupss 12986 | . 2 ⊢ ((𝐴 ⊆ ℤ ∧ 𝐴 ≠ ∅ ∧ ∃𝑥 ∈ ℤ ∀𝑦 ∈ 𝐴 𝑦 ≤ 𝑥) → ∃𝑥 ∈ 𝐴 (∀𝑦 ∈ 𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 < 𝑧))) | |
2 | ssel2 3993 | . . . . . . 7 ⊢ ((𝐴 ⊆ ℤ ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ ℤ) | |
3 | 2 | zred 12729 | . . . . . 6 ⊢ ((𝐴 ⊆ ℤ ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ ℝ) |
4 | ltso 11348 | . . . . . . . . . 10 ⊢ < Or ℝ | |
5 | 4 | a1i 11 | . . . . . . . . 9 ⊢ (⊤ → < Or ℝ) |
6 | 5 | eqsup 9503 | . . . . . . . 8 ⊢ (⊤ → ((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ 𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 < 𝑧)) → sup(𝐴, ℝ, < ) = 𝑥)) |
7 | 6 | mptru 1546 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ 𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 < 𝑧)) → sup(𝐴, ℝ, < ) = 𝑥) |
8 | 7 | 3expib 1123 | . . . . . 6 ⊢ (𝑥 ∈ ℝ → ((∀𝑦 ∈ 𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 < 𝑧)) → sup(𝐴, ℝ, < ) = 𝑥)) |
9 | 3, 8 | syl 17 | . . . . 5 ⊢ ((𝐴 ⊆ ℤ ∧ 𝑥 ∈ 𝐴) → ((∀𝑦 ∈ 𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 < 𝑧)) → sup(𝐴, ℝ, < ) = 𝑥)) |
10 | simpr 484 | . . . . . 6 ⊢ ((𝐴 ⊆ ℤ ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ 𝐴) | |
11 | eleq1 2829 | . . . . . 6 ⊢ (sup(𝐴, ℝ, < ) = 𝑥 → (sup(𝐴, ℝ, < ) ∈ 𝐴 ↔ 𝑥 ∈ 𝐴)) | |
12 | 10, 11 | syl5ibrcom 247 | . . . . 5 ⊢ ((𝐴 ⊆ ℤ ∧ 𝑥 ∈ 𝐴) → (sup(𝐴, ℝ, < ) = 𝑥 → sup(𝐴, ℝ, < ) ∈ 𝐴)) |
13 | 9, 12 | syld 47 | . . . 4 ⊢ ((𝐴 ⊆ ℤ ∧ 𝑥 ∈ 𝐴) → ((∀𝑦 ∈ 𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 < 𝑧)) → sup(𝐴, ℝ, < ) ∈ 𝐴)) |
14 | 13 | rexlimdva 3155 | . . 3 ⊢ (𝐴 ⊆ ℤ → (∃𝑥 ∈ 𝐴 (∀𝑦 ∈ 𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 < 𝑧)) → sup(𝐴, ℝ, < ) ∈ 𝐴)) |
15 | 14 | 3ad2ant1 1134 | . 2 ⊢ ((𝐴 ⊆ ℤ ∧ 𝐴 ≠ ∅ ∧ ∃𝑥 ∈ ℤ ∀𝑦 ∈ 𝐴 𝑦 ≤ 𝑥) → (∃𝑥 ∈ 𝐴 (∀𝑦 ∈ 𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 < 𝑧)) → sup(𝐴, ℝ, < ) ∈ 𝐴)) |
16 | 1, 15 | mpd 15 | 1 ⊢ ((𝐴 ⊆ ℤ ∧ 𝐴 ≠ ∅ ∧ ∃𝑥 ∈ ℤ ∀𝑦 ∈ 𝐴 𝑦 ≤ 𝑥) → sup(𝐴, ℝ, < ) ∈ 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 ∧ w3a 1087 = wceq 1539 ⊤wtru 1540 ∈ wcel 2108 ≠ wne 2940 ∀wral 3061 ∃wrex 3070 ⊆ wss 3966 ∅c0 4342 class class class wbr 5151 Or wor 5600 supcsup 9487 ℝcr 11161 < clt 11302 ≤ cle 11303 ℤcz 12620 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-sep 5305 ax-nul 5315 ax-pow 5374 ax-pr 5441 ax-un 7761 ax-cnex 11218 ax-resscn 11219 ax-1cn 11220 ax-icn 11221 ax-addcl 11222 ax-addrcl 11223 ax-mulcl 11224 ax-mulrcl 11225 ax-mulcom 11226 ax-addass 11227 ax-mulass 11228 ax-distr 11229 ax-i2m1 11230 ax-1ne0 11231 ax-1rid 11232 ax-rnegex 11233 ax-rrecex 11234 ax-cnre 11235 ax-pre-lttri 11236 ax-pre-lttrn 11237 ax-pre-ltadd 11238 ax-pre-mulgt0 11239 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1779 df-nf 1783 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3380 df-reu 3381 df-rab 3437 df-v 3483 df-sbc 3795 df-csb 3912 df-dif 3969 df-un 3971 df-in 3973 df-ss 3983 df-pss 3986 df-nul 4343 df-if 4535 df-pw 4610 df-sn 4635 df-pr 4637 df-op 4641 df-uni 4916 df-iun 5001 df-br 5152 df-opab 5214 df-mpt 5235 df-tr 5269 df-id 5587 df-eprel 5593 df-po 5601 df-so 5602 df-fr 5645 df-we 5647 df-xp 5699 df-rel 5700 df-cnv 5701 df-co 5702 df-dm 5703 df-rn 5704 df-res 5705 df-ima 5706 df-pred 6329 df-ord 6395 df-on 6396 df-lim 6397 df-suc 6398 df-iota 6522 df-fun 6571 df-fn 6572 df-f 6573 df-f1 6574 df-fo 6575 df-f1o 6576 df-fv 6577 df-riota 7395 df-ov 7441 df-oprab 7442 df-mpo 7443 df-om 7895 df-2nd 8023 df-frecs 8314 df-wrecs 8345 df-recs 8419 df-rdg 8458 df-er 8753 df-en 8994 df-dom 8995 df-sdom 8996 df-sup 9489 df-inf 9490 df-pnf 11304 df-mnf 11305 df-xr 11306 df-ltxr 11307 df-le 11308 df-sub 11501 df-neg 11502 df-nn 12274 df-n0 12534 df-z 12621 df-uz 12886 |
This theorem is referenced by: suprzub 12988 gcdcllem3 16544 maxprmfct 16752 pcprecl 16882 prmreclem1 16959 0ram 17063 0ramcl 17066 gexex 19895 |
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