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| Mirrors > Home > MPE Home > Th. List > supicclub2 | Structured version Visualization version GIF version | ||
| Description: The supremum of a bounded set of real numbers is the least upper bound. (Contributed by Thierry Arnoux, 23-May-2019.) |
| Ref | Expression |
|---|---|
| supicc.1 | ⊢ (𝜑 → 𝐵 ∈ ℝ) |
| supicc.2 | ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| supicc.3 | ⊢ (𝜑 → 𝐴 ⊆ (𝐵[,]𝐶)) |
| supicc.4 | ⊢ (𝜑 → 𝐴 ≠ ∅) |
| supiccub.1 | ⊢ (𝜑 → 𝐷 ∈ 𝐴) |
| supicclub2.1 | ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → 𝑧 ≤ 𝐷) |
| Ref | Expression |
|---|---|
| supicclub2 | ⊢ (𝜑 → sup(𝐴, ℝ, < ) ≤ 𝐷) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iccssxr 13585 | . . 3 ⊢ (𝐵[,]𝐶) ⊆ ℝ* | |
| 2 | supicc.1 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
| 3 | supicc.2 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
| 4 | supicc.3 | . . . 4 ⊢ (𝜑 → 𝐴 ⊆ (𝐵[,]𝐶)) | |
| 5 | supicc.4 | . . . 4 ⊢ (𝜑 → 𝐴 ≠ ∅) | |
| 6 | 2, 3, 4, 5 | supicc 13656 | . . 3 ⊢ (𝜑 → sup(𝐴, ℝ, < ) ∈ (𝐵[,]𝐶)) |
| 7 | 1, 6 | sselid 3911 | . 2 ⊢ (𝜑 → sup(𝐴, ℝ, < ) ∈ ℝ*) |
| 8 | 4, 1 | sstrdi 3925 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ ℝ*) |
| 9 | supiccub.1 | . . 3 ⊢ (𝜑 → 𝐷 ∈ 𝐴) | |
| 10 | 8, 9 | sseldd 3914 | . 2 ⊢ (𝜑 → 𝐷 ∈ ℝ*) |
| 11 | supicclub2.1 | . . . . 5 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → 𝑧 ≤ 𝐷) | |
| 12 | 8 | sselda 3913 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → 𝑧 ∈ ℝ*) |
| 13 | 10 | adantr 486 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → 𝐷 ∈ ℝ*) |
| 14 | 12, 13 | xrlenltd 11399 | . . . . 5 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → (𝑧 ≤ 𝐷 ↔ ¬ 𝐷 < 𝑧)) |
| 15 | 11, 14 | mpbid 235 | . . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → ¬ 𝐷 < 𝑧) |
| 16 | 15 | nrexdv 3161 | . . 3 ⊢ (𝜑 → ¬ ∃𝑧 ∈ 𝐴 𝐷 < 𝑧) |
| 17 | 2, 3, 4, 5, 9 | supicclub 13658 | . . 3 ⊢ (𝜑 → (𝐷 < sup(𝐴, ℝ, < ) ↔ ∃𝑧 ∈ 𝐴 𝐷 < 𝑧)) |
| 18 | 16, 17 | mtbird 328 | . 2 ⊢ (𝜑 → ¬ 𝐷 < sup(𝐴, ℝ, < )) |
| 19 | 7, 10, 18 | xrnltled 11402 | 1 ⊢ (𝜑 → sup(𝐴, ℝ, < ) ≤ 𝐷) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 ∈ wcel 2147 ≠ wne 2959 ∃wrex 3090 ⊆ wss 3900 ∅c0 4281 class class class wbr 5106 (class class class)co 7440 supcsup 9456 ℝcr 11223 ℝ*cxr 11366 < clt 11367 ≤ cle 11368 [,]cicc 13503 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7772 ax-cnex 11280 ax-resscn 11281 ax-1cn 11282 ax-icn 11283 ax-addcl 11284 ax-addrcl 11285 ax-mulcl 11286 ax-mulrcl 11287 ax-mulcom 11288 ax-addass 11289 ax-mulass 11290 ax-distr 11291 ax-i2m1 11292 ax-1ne0 11293 ax-1rid 11294 ax-rnegex 11295 ax-rrecex 11296 ax-cnre 11297 ax-pre-lttri 11298 ax-pre-lttrn 11299 ax-pre-ltadd 11300 ax-pre-mulgt0 11301 ax-pre-sup 11302 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-id 5550 df-po 5563 df-so 5564 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6509 df-fun 6557 df-fn 6558 df-f 6559 df-f1 6560 df-fo 6561 df-f1o 6562 df-fv 6563 df-riota 7397 df-ov 7443 df-oprab 7444 df-mpo 7445 df-1st 8022 df-2nd 8023 df-er 8742 df-en 8999 df-dom 9000 df-sdom 9001 df-sup 9458 df-pnf 11369 df-mnf 11370 df-xr 11371 df-ltxr 11372 df-le 11373 df-sub 11567 df-neg 11568 df-icc 13507 |
| This theorem is used by: (None) |
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