Mathbox for Thierry Arnoux |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > xrsp0 | Structured version Visualization version GIF version |
Description: The poset 0 of the extended real numbers is minus infinity. (Contributed by Thierry Arnoux, 18-Feb-2018.) (Proof shortened by AV, 28-Sep-2020.) |
Ref | Expression |
---|---|
xrsp0 | ⊢ -∞ = (0.‘ℝ*𝑠) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xrsex 20554 | . . 3 ⊢ ℝ*𝑠 ∈ V | |
2 | xrsbas 20555 | . . . 4 ⊢ ℝ* = (Base‘ℝ*𝑠) | |
3 | eqid 2821 | . . . 4 ⊢ (glb‘ℝ*𝑠) = (glb‘ℝ*𝑠) | |
4 | eqid 2821 | . . . 4 ⊢ (0.‘ℝ*𝑠) = (0.‘ℝ*𝑠) | |
5 | 2, 3, 4 | p0val 17645 | . . 3 ⊢ (ℝ*𝑠 ∈ V → (0.‘ℝ*𝑠) = ((glb‘ℝ*𝑠)‘ℝ*)) |
6 | 1, 5 | ax-mp 5 | . 2 ⊢ (0.‘ℝ*𝑠) = ((glb‘ℝ*𝑠)‘ℝ*) |
7 | ssid 3989 | . . 3 ⊢ ℝ* ⊆ ℝ* | |
8 | xrslt 30658 | . . . 4 ⊢ < = (lt‘ℝ*𝑠) | |
9 | xrstos 30661 | . . . . 5 ⊢ ℝ*𝑠 ∈ Toset | |
10 | 9 | a1i 11 | . . . 4 ⊢ (ℝ* ⊆ ℝ* → ℝ*𝑠 ∈ Toset) |
11 | id 22 | . . . 4 ⊢ (ℝ* ⊆ ℝ* → ℝ* ⊆ ℝ*) | |
12 | 2, 8, 10, 11 | tosglb 30652 | . . 3 ⊢ (ℝ* ⊆ ℝ* → ((glb‘ℝ*𝑠)‘ℝ*) = inf(ℝ*, ℝ*, < )) |
13 | 7, 12 | ax-mp 5 | . 2 ⊢ ((glb‘ℝ*𝑠)‘ℝ*) = inf(ℝ*, ℝ*, < ) |
14 | xrinfm 30472 | . 2 ⊢ inf(ℝ*, ℝ*, < ) = -∞ | |
15 | 6, 13, 14 | 3eqtrri 2849 | 1 ⊢ -∞ = (0.‘ℝ*𝑠) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1533 ∈ wcel 2110 Vcvv 3495 ⊆ wss 3936 ‘cfv 6350 infcinf 8899 -∞cmnf 10667 ℝ*cxr 10668 < clt 10669 ℝ*𝑠cxrs 16767 glbcglb 17547 Tosetctos 17637 0.cp0 17641 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-rep 5183 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 ax-un 7455 ax-cnex 10587 ax-resscn 10588 ax-1cn 10589 ax-icn 10590 ax-addcl 10591 ax-addrcl 10592 ax-mulcl 10593 ax-mulrcl 10594 ax-mulcom 10595 ax-addass 10596 ax-mulass 10597 ax-distr 10598 ax-i2m1 10599 ax-1ne0 10600 ax-1rid 10601 ax-rnegex 10602 ax-rrecex 10603 ax-cnre 10604 ax-pre-lttri 10605 ax-pre-lttrn 10606 ax-pre-ltadd 10607 ax-pre-mulgt0 10608 ax-pre-sup 10609 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3497 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4833 df-int 4870 df-iun 4914 df-br 5060 df-opab 5122 df-mpt 5140 df-tr 5166 df-id 5455 df-eprel 5460 df-po 5469 df-so 5470 df-fr 5509 df-we 5511 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-res 5562 df-ima 5563 df-pred 6143 df-ord 6189 df-on 6190 df-lim 6191 df-suc 6192 df-iota 6309 df-fun 6352 df-fn 6353 df-f 6354 df-f1 6355 df-fo 6356 df-f1o 6357 df-fv 6358 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-om 7575 df-1st 7683 df-2nd 7684 df-wrecs 7941 df-recs 8002 df-rdg 8040 df-1o 8096 df-oadd 8100 df-er 8283 df-en 8504 df-dom 8505 df-sdom 8506 df-fin 8507 df-sup 8900 df-inf 8901 df-pnf 10671 df-mnf 10672 df-xr 10673 df-ltxr 10674 df-le 10675 df-sub 10866 df-neg 10867 df-nn 11633 df-2 11694 df-3 11695 df-4 11696 df-5 11697 df-6 11698 df-7 11699 df-8 11700 df-9 11701 df-n0 11892 df-z 11976 df-dec 12093 df-uz 12238 df-fz 12887 df-struct 16479 df-ndx 16480 df-slot 16481 df-base 16483 df-plusg 16572 df-mulr 16573 df-tset 16578 df-ple 16579 df-ds 16581 df-xrs 16769 df-proset 17532 df-poset 17550 df-plt 17562 df-glb 17579 df-toset 17638 df-p0 17643 |
This theorem is referenced by: (None) |
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