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| Mirrors > Home > MPE Home > Th. List > infssuzle | Structured version Visualization version GIF version | ||
| Description: The infimum of a subset of an upper set of integers is less than or equal to all members of the subset. (Contributed by NM, 11-Oct-2005.) (Revised by AV, 5-Sep-2020.) |
| Ref | Expression |
|---|---|
| infssuzle | ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝐴 ∈ 𝑆) → inf(𝑆, ℝ, < ) ≤ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ne0i 4286 | . . 3 ⊢ (𝐴 ∈ 𝑆 → 𝑆 ≠ ∅) | |
| 2 | uzwo 13045 | . . 3 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑆 ≠ ∅) → ∃𝑗 ∈ 𝑆 ∀𝑘 ∈ 𝑆 𝑗 ≤ 𝑘) | |
| 3 | 1, 2 | sylan2 605 | . 2 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝐴 ∈ 𝑆) → ∃𝑗 ∈ 𝑆 ∀𝑘 ∈ 𝑆 𝑗 ≤ 𝑘) |
| 4 | uzssz 12993 | . . . . 5 ⊢ (ℤ≥‘𝑀) ⊆ ℤ | |
| 5 | zssre 12707 | . . . . 5 ⊢ ℤ ⊆ ℝ | |
| 6 | 4, 5 | sstri 3918 | . . . 4 ⊢ (ℤ≥‘𝑀) ⊆ ℝ |
| 7 | sstr 3917 | . . . 4 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ (ℤ≥‘𝑀) ⊆ ℝ) → 𝑆 ⊆ ℝ) | |
| 8 | 6, 7 | mpan2 704 | . . 3 ⊢ (𝑆 ⊆ (ℤ≥‘𝑀) → 𝑆 ⊆ ℝ) |
| 9 | lbinfle 12279 | . . . 4 ⊢ ((𝑆 ⊆ ℝ ∧ ∃𝑗 ∈ 𝑆 ∀𝑘 ∈ 𝑆 𝑗 ≤ 𝑘 ∧ 𝐴 ∈ 𝑆) → inf(𝑆, ℝ, < ) ≤ 𝐴) | |
| 10 | 9 | 3com23 1144 | . . 3 ⊢ ((𝑆 ⊆ ℝ ∧ 𝐴 ∈ 𝑆 ∧ ∃𝑗 ∈ 𝑆 ∀𝑘 ∈ 𝑆 𝑗 ≤ 𝑘) → inf(𝑆, ℝ, < ) ≤ 𝐴) |
| 11 | 8, 10 | syl3an1 1181 | . 2 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝐴 ∈ 𝑆 ∧ ∃𝑗 ∈ 𝑆 ∀𝑘 ∈ 𝑆 𝑗 ≤ 𝑘) → inf(𝑆, ℝ, < ) ≤ 𝐴) |
| 12 | 3, 11 | mpd3an3 1491 | 1 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝐴 ∈ 𝑆) → inf(𝑆, ℝ, < ) ≤ 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2144 ≠ wne 2955 ∀wral 3076 ∃wrex 3086 ⊆ wss 3896 ∅c0 4277 class class class wbr 5102 ‘cfv 6543 infcinf 9440 ℝcr 11206 < clt 11350 ≤ cle 11351 ℤcz 12700 ℤ≥cuz 12972 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 ax-cnex 11263 ax-resscn 11264 ax-1cn 11265 ax-icn 11266 ax-addcl 11267 ax-addrcl 11268 ax-mulcl 11269 ax-mulrcl 11270 ax-mulcom 11271 ax-addass 11272 ax-mulass 11273 ax-distr 11274 ax-i2m1 11275 ax-1ne0 11276 ax-1rid 11277 ax-rnegex 11278 ax-rrecex 11279 ax-cnre 11280 ax-pre-lttri 11281 ax-pre-lttrn 11282 ax-pre-ltadd 11283 ax-pre-mulgt0 11284 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6307 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7381 df-ov 7427 df-oprab 7428 df-mpo 7429 df-om 7882 df-2nd 8006 df-frecs 8307 df-wrecs 8338 df-recs 8387 df-rdg 8426 df-er 8725 df-en 8982 df-dom 8983 df-sdom 8984 df-sup 9441 df-inf 9442 df-pnf 11352 df-mnf 11353 df-xr 11354 df-ltxr 11355 df-le 11356 df-sub 11550 df-neg 11551 df-nn 12343 df-n0 12614 df-z 12701 df-uz 12973 |
| This theorem is used by: zsupss 13071 uzwo3 13077 divalglem5 16576 bitsfzolem 16613 bezoutlem3 16723 lcmledvds 16783 lcmfledvds 16816 odzdvds 16982 4sqlem13 17144 4sqlem17 17148 ramcl2lem 17196 ramtub 17199 odlem2 19762 gexlem2 19805 zringlpirlem3 21779 ovolicc2lem4 25850 iundisj 25878 ig1peu 26502 ig1pdvds 26507 ftalem5 27413 iundisjf 33234 iundisjfi 33438 ig1pmindeg 34184 exsslsb 34279 dgraaub 44287 elaa2lem 47379 |
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