| Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > xrsp1 | Structured version Visualization version GIF version | ||
| Description: The poset 1 of the extended real numbers is plus infinity. (Contributed by Thierry Arnoux, 18-Feb-2018.) |
| Ref | Expression |
|---|---|
| xrsp1 | ⊢ +∞ = (1.‘ℝ*𝑠) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xrsex 21695 | . . 3 ⊢ ℝ*𝑠 ∈ V | |
| 2 | xrsbas 17778 | . . . 4 ⊢ ℝ* = (Base‘ℝ*𝑠) | |
| 3 | eqid 2760 | . . . 4 ⊢ (lub‘ℝ*𝑠) = (lub‘ℝ*𝑠) | |
| 4 | eqid 2760 | . . . 4 ⊢ (1.‘ℝ*𝑠) = (1.‘ℝ*𝑠) | |
| 5 | 2, 3, 4 | p1val 18600 | . . 3 ⊢ (ℝ*𝑠 ∈ V → (1.‘ℝ*𝑠) = ((lub‘ℝ*𝑠)‘ℝ*)) |
| 6 | 1, 5 | ax-mp 5 | . 2 ⊢ (1.‘ℝ*𝑠) = ((lub‘ℝ*𝑠)‘ℝ*) |
| 7 | ssid 3930 | . . 3 ⊢ ℝ* ⊆ ℝ* | |
| 8 | xrslt 33568 | . . . 4 ⊢ < = (lt‘ℝ*𝑠) | |
| 9 | xrstos 33571 | . . . . 5 ⊢ ℝ*𝑠 ∈ Toset | |
| 10 | 9 | a1i 11 | . . . 4 ⊢ (ℝ* ⊆ ℝ* → ℝ*𝑠 ∈ Toset) |
| 11 | id 23 | . . . 4 ⊢ (ℝ* ⊆ ℝ* → ℝ* ⊆ ℝ*) | |
| 12 | 2, 8, 10, 11 | toslub 33534 | . . 3 ⊢ (ℝ* ⊆ ℝ* → ((lub‘ℝ*𝑠)‘ℝ*) = sup(ℝ*, ℝ*, < )) |
| 13 | 7, 12 | ax-mp 5 | . 2 ⊢ ((lub‘ℝ*𝑠)‘ℝ*) = sup(ℝ*, ℝ*, < ) |
| 14 | xrsup 14008 | . 2 ⊢ sup(ℝ*, ℝ*, < ) = +∞ | |
| 15 | 6, 13, 14 | 3eqtrri 2788 | 1 ⊢ +∞ = (1.‘ℝ*𝑠) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 ∈ wcel 2144 Vcvv 3450 ⊆ wss 3895 ‘cfv 6538 supcsup 9432 +∞cpnf 11340 ℝ*cxr 11342 < clt 11343 ℝ*𝑠cxrs 17672 lubclub 18483 Tosetctos 18588 1.cp1 18596 |
| 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-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| 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 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-tp 4588 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-1o 8476 df-er 8717 df-en 8974 df-dom 8975 df-sdom 8976 df-fin 8977 df-sup 9434 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-nn 12336 df-2 12405 df-3 12406 df-4 12407 df-5 12408 df-6 12409 df-7 12410 df-8 12411 df-9 12412 df-n0 12607 df-z 12694 df-dec 12815 df-uz 12966 df-fz 13640 df-struct 17325 df-slot 17360 df-ndx 17372 df-base 17388 df-plusg 17441 df-mulr 17442 df-tset 17447 df-ple 17448 df-ds 17450 df-xrs 17674 df-proset 18468 df-poset 18487 df-plt 18502 df-lub 18518 df-toset 18589 df-p1 18598 |
| This theorem is used by: (None) |
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