Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > supiccub | Structured version Visualization version GIF version |
Description: The supremum of a bounded set of real numbers is an upper bound. (Contributed by Thierry Arnoux, 20-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) |
Ref | Expression |
---|---|
supiccub | ⊢ (𝜑 → 𝐷 ≤ sup(𝐴, ℝ, < )) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | supicc.3 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ (𝐵[,]𝐶)) | |
2 | supicc.1 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ) | |
3 | supicc.2 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
4 | iccssre 13161 | . . . 4 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ) → (𝐵[,]𝐶) ⊆ ℝ) | |
5 | 2, 3, 4 | syl2anc 584 | . . 3 ⊢ (𝜑 → (𝐵[,]𝐶) ⊆ ℝ) |
6 | 1, 5 | sstrd 3931 | . 2 ⊢ (𝜑 → 𝐴 ⊆ ℝ) |
7 | supicc.4 | . 2 ⊢ (𝜑 → 𝐴 ≠ ∅) | |
8 | 2 | adantr 481 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ ℝ) |
9 | 8 | rexrd 11025 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ ℝ*) |
10 | 3 | adantr 481 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ ℝ) |
11 | 10 | rexrd 11025 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ ℝ*) |
12 | 1 | sselda 3921 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ (𝐵[,]𝐶)) |
13 | iccleub 13134 | . . . . 5 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐶 ∈ ℝ* ∧ 𝑥 ∈ (𝐵[,]𝐶)) → 𝑥 ≤ 𝐶) | |
14 | 9, 11, 12, 13 | syl3anc 1370 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ≤ 𝐶) |
15 | 14 | ralrimiva 3103 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 𝑥 ≤ 𝐶) |
16 | brralrspcev 5134 | . . 3 ⊢ ((𝐶 ∈ ℝ ∧ ∀𝑥 ∈ 𝐴 𝑥 ≤ 𝐶) → ∃𝑦 ∈ ℝ ∀𝑥 ∈ 𝐴 𝑥 ≤ 𝑦) | |
17 | 3, 15, 16 | syl2anc 584 | . 2 ⊢ (𝜑 → ∃𝑦 ∈ ℝ ∀𝑥 ∈ 𝐴 𝑥 ≤ 𝑦) |
18 | supiccub.1 | . 2 ⊢ (𝜑 → 𝐷 ∈ 𝐴) | |
19 | 6, 7, 17, 18 | suprubd 11937 | 1 ⊢ (𝜑 → 𝐷 ≤ sup(𝐴, ℝ, < )) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∈ wcel 2106 ≠ wne 2943 ∀wral 3064 ∃wrex 3065 ⊆ wss 3887 ∅c0 4256 class class class wbr 5074 (class class class)co 7275 supcsup 9199 ℝcr 10870 ℝ*cxr 11008 < clt 11009 ≤ cle 11010 [,]cicc 13082 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-mpt 5158 df-id 5489 df-po 5503 df-so 5504 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-sup 9201 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-icc 13086 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |