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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 12646 avoids ax-pre-sup 11144.) (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 12931 | . 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 3929 | . . . . . . 7 ⊢ ((𝐴 ⊆ ℤ ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ ℤ) | |
| 3 | 2 | zred 12670 | . . . . . 6 ⊢ ((𝐴 ⊆ ℤ ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ ℝ) |
| 4 | ltso 11256 | . . . . . . . . . 10 ⊢ < Or ℝ | |
| 5 | 4 | a1i 11 | . . . . . . . . 9 ⊢ (⊤ → < Or ℝ) |
| 6 | 5 | eqsup 9395 | . . . . . . . 8 ⊢ (⊤ → ((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ 𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 < 𝑧)) → sup(𝐴, ℝ, < ) = 𝑥)) |
| 7 | 6 | mptru 1566 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ ∧ ∀𝑦 ∈ 𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 < 𝑧)) → sup(𝐴, ℝ, < ) = 𝑥) |
| 8 | 7 | 3expib 1134 | . . . . . 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 488 | . . . . . 6 ⊢ ((𝐴 ⊆ ℤ ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ 𝐴) | |
| 11 | eleq1 2849 | . . . . . 6 ⊢ (sup(𝐴, ℝ, < ) = 𝑥 → (sup(𝐴, ℝ, < ) ∈ 𝐴 ↔ 𝑥 ∈ 𝐴)) | |
| 12 | 10, 11 | syl5ibrcom 249 | . . . . 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 3162 | . . 3 ⊢ (𝐴 ⊆ ℤ → (∃𝑥 ∈ 𝐴 (∀𝑦 ∈ 𝐴 ¬ 𝑥 < 𝑦 ∧ ∀𝑦 ∈ ℝ (𝑦 < 𝑥 → ∃𝑧 ∈ 𝐴 𝑦 < 𝑧)) → sup(𝐴, ℝ, < ) ∈ 𝐴)) |
| 15 | 14 | 3ad2ant1 1145 | . 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 399 ∧ w3a 1097 = wceq 1559 ⊤wtru 1560 ∈ wcel 2141 ≠ wne 2956 ∀wral 3075 ∃wrex 3085 ⊆ wss 3902 ∅c0 4283 class class class wbr 5097 Or wor 5550 supcsup 9379 ℝcr 11065 < clt 11209 ≤ cle 11210 ℤcz 12561 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7712 ax-cnex 11122 ax-resscn 11123 ax-1cn 11124 ax-icn 11125 ax-addcl 11126 ax-addrcl 11127 ax-mulcl 11128 ax-mulrcl 11129 ax-mulcom 11130 ax-addass 11131 ax-mulass 11132 ax-distr 11133 ax-i2m1 11134 ax-1ne0 11135 ax-1rid 11136 ax-rnegex 11137 ax-rrecex 11138 ax-cnre 11139 ax-pre-lttri 11140 ax-pre-lttrn 11141 ax-pre-ltadd 11142 ax-pre-mulgt0 11143 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5179 df-tr 5205 df-id 5538 df-eprel 5543 df-po 5551 df-so 5552 df-fr 5596 df-we 5598 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-pred 6282 df-ord 6343 df-on 6344 df-lim 6345 df-suc 6346 df-iota 6471 df-fun 6517 df-fn 6518 df-f 6519 df-f1 6520 df-fo 6521 df-f1o 6522 df-fv 6523 df-riota 7347 df-ov 7393 df-oprab 7394 df-mpo 7395 df-om 7841 df-2nd 7965 df-frecs 8255 df-wrecs 8286 df-recs 8335 df-rdg 8374 df-er 8671 df-en 8921 df-dom 8922 df-sdom 8923 df-sup 9381 df-inf 9382 df-pnf 11211 df-mnf 11212 df-xr 11213 df-ltxr 11214 df-le 11215 df-sub 11409 df-neg 11410 df-nn 12204 df-n0 12475 df-z 12562 df-uz 12833 |
| This theorem is referenced by: suprzub 12933 gcdcllem3 16525 maxprmfct 16734 pcprecl 16865 prmreclem1 16942 0ram 17046 0ramcl 17049 gexex 19883 |
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