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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 13483 | . . 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 13554 | . . 3 ⊢ (𝜑 → sup(𝐴, ℝ, < ) ∈ (𝐵[,]𝐶)) |
| 7 | 1, 6 | sselid 3932 | . 2 ⊢ (𝜑 → sup(𝐴, ℝ, < ) ∈ ℝ*) |
| 8 | 4, 1 | sstrdi 3946 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ ℝ*) |
| 9 | supiccub.1 | . . 3 ⊢ (𝜑 → 𝐷 ∈ 𝐴) | |
| 10 | 8, 9 | sseldd 3935 | . 2 ⊢ (𝜑 → 𝐷 ∈ ℝ*) |
| 11 | supicclub2.1 | . . . . 5 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → 𝑧 ≤ 𝐷) | |
| 12 | 8 | sselda 3934 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → 𝑧 ∈ ℝ*) |
| 13 | 10 | adantr 486 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → 𝐷 ∈ ℝ*) |
| 14 | 12, 13 | xrlenltd 11300 | . . . . 5 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → (𝑧 ≤ 𝐷 ↔ ¬ 𝐷 < 𝑧)) |
| 15 | 11, 14 | mpbid 235 | . . . 4 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝐴) → ¬ 𝐷 < 𝑧) |
| 16 | 15 | nrexdv 3159 | . . 3 ⊢ (𝜑 → ¬ ∃𝑧 ∈ 𝐴 𝐷 < 𝑧) |
| 17 | 2, 3, 4, 5, 9 | supicclub 13556 | . . 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 11303 | 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 2145 ≠ wne 2957 ∃wrex 3088 ⊆ wss 3902 ∅c0 4282 class class class wbr 5107 (class class class)co 7416 supcsup 9413 ℝcr 11124 ℝ*cxr 11267 < clt 11268 ≤ cle 11269 [,]cicc 13401 |
| 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-pow 5334 ax-pr 5402 ax-un 7739 ax-cnex 11181 ax-resscn 11182 ax-1cn 11183 ax-icn 11184 ax-addcl 11185 ax-addrcl 11186 ax-mulcl 11187 ax-mulrcl 11188 ax-mulcom 11189 ax-addass 11190 ax-mulass 11191 ax-distr 11192 ax-i2m1 11193 ax-1ne0 11194 ax-1rid 11195 ax-rnegex 11196 ax-rrecex 11197 ax-cnre 11198 ax-pre-lttri 11199 ax-pre-lttrn 11200 ax-pre-ltadd 11201 ax-pre-mulgt0 11202 ax-pre-sup 11203 |
| 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-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-po 5567 df-so 5568 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-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-ov 7419 df-oprab 7420 df-mpo 7421 df-1st 7989 df-2nd 7990 df-er 8699 df-en 8956 df-dom 8957 df-sdom 8958 df-sup 9415 df-pnf 11270 df-mnf 11271 df-xr 11272 df-ltxr 11273 df-le 11274 df-sub 11468 df-neg 11469 df-icc 13405 |
| This theorem is used by: (None) |
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