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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 12600 avoids ax-pre-sup 11107.) (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 12878 | . 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 3917 | . . . . . . 7 ⊢ ((𝐴 ⊆ ℤ ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ ℤ) | |
| 3 | 2 | zred 12624 | . . . . . 6 ⊢ ((𝐴 ⊆ ℤ ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ ℝ) |
| 4 | ltso 11217 | . . . . . . . . . 10 ⊢ < Or ℝ | |
| 5 | 4 | a1i 11 | . . . . . . . . 9 ⊢ (⊤ → < Or ℝ) |
| 6 | 5 | eqsup 9362 | . . . . . . . 8 ⊢ (⊤ → ((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ 𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 < 𝑧)) → sup(𝐴, ℝ, < ) = 𝑥)) |
| 7 | 6 | mptru 1549 | . . . . . . 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 2825 | . . . . . 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 3139 | . . 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 1542 ⊤wtru 1543 ∈ wcel 2114 ≠ wne 2933 ∀wral 3052 ∃wrex 3062 ⊆ wss 3890 ∅c0 4274 class class class wbr 5086 Or wor 5531 supcsup 9346 ℝcr 11028 < clt 11170 ≤ cle 11171 ℤcz 12515 |
| 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-pow 5302 ax-pr 5370 ax-un 7682 ax-cnex 11085 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106 |
| 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-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 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-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8342 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-sup 9348 df-inf 9349 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-nn 12166 df-n0 12429 df-z 12516 df-uz 12780 |
| This theorem is referenced by: suprzub 12880 gcdcllem3 16461 maxprmfct 16670 pcprecl 16801 prmreclem1 16878 0ram 16982 0ramcl 16985 gexex 19819 |
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