xrltmaxsup - Intuitionistic Logic Explorer

	Intuitionistic Logic Explorer		< Previous Next > Nearby theorems
Mirrors > Home > ILE Home > Th. List > xrltmaxsup		GIF version

Theorem xrltmaxsup 11819

Description: The maximum as a least upper bound. (Contributed by Jim Kingdon, 10-May-2023.)

**Assertion**
Ref	Expression
xrltmaxsup	⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) → (𝐶 < sup({𝐴, 𝐵}, ℝ^, < ) ↔ (𝐶 < 𝐴 ∨ 𝐶 < 𝐵)))

**Proof of Theorem xrltmaxsup**
Step	Hyp	Ref	Expression
1		simpl1 1026	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < sup({𝐴, 𝐵}, ℝ^, < )) → 𝐴 ∈ ℝ^*)
2		simpl2 1027	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < sup({𝐴, 𝐵}, ℝ^, < )) → 𝐵 ∈ ℝ^*)
3		simpl3 1028	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < sup({𝐴, 𝐵}, ℝ^, < )) → 𝐶 ∈ ℝ^*)
4		simpr 110	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < sup({𝐴, 𝐵}, ℝ^, < )) → 𝐶 < sup({𝐴, 𝐵}, ℝ^*, < ))
5		xrmaxleastlt 11818	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^) ∧ (𝐶 ∈ ℝ^ ∧ 𝐶 < sup({𝐴, 𝐵}, ℝ^*, < ))) → (𝐶 < 𝐴 ∨ 𝐶 < 𝐵))
6	1, 2, 3, 4, 5	syl22anc 1274	. 2 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < sup({𝐴, 𝐵}, ℝ^, < )) → (𝐶 < 𝐴 ∨ 𝐶 < 𝐵))
7		simpl3 1028	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < 𝐴) → 𝐶 ∈ ℝ^)
8		simpl1 1026	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < 𝐴) → 𝐴 ∈ ℝ^)
9		simpl2 1027	. . . . 5 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < 𝐴) → 𝐵 ∈ ℝ^)
10		xrmaxcl 11814	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^) → sup({𝐴, 𝐵}, ℝ^, < ) ∈ ℝ^*)
11	8, 9, 10	syl2anc 411	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < 𝐴) → sup({𝐴, 𝐵}, ℝ^, < ) ∈ ℝ^*)
12		simpr 110	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^*) ∧ 𝐶 < 𝐴) → 𝐶 < 𝐴)
13		xrmax1sup 11815	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^) → 𝐴 ≤ sup({𝐴, 𝐵}, ℝ^, < ))
14	8, 9, 13	syl2anc 411	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < 𝐴) → 𝐴 ≤ sup({𝐴, 𝐵}, ℝ^, < ))
15	7, 8, 11, 12, 14	xrltletrd 10046	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < 𝐴) → 𝐶 < sup({𝐴, 𝐵}, ℝ^, < ))
16		simpl3 1028	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < 𝐵) → 𝐶 ∈ ℝ^)
17		simpl2 1027	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < 𝐵) → 𝐵 ∈ ℝ^)
18		simpl1 1026	. . . . 5 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < 𝐵) → 𝐴 ∈ ℝ^)
19	18, 17, 10	syl2anc 411	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < 𝐵) → sup({𝐴, 𝐵}, ℝ^, < ) ∈ ℝ^*)
20		simpr 110	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^*) ∧ 𝐶 < 𝐵) → 𝐶 < 𝐵)
21		xrmax2sup 11816	. . . . 5 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^) → 𝐵 ≤ sup({𝐴, 𝐵}, ℝ^, < ))
22	18, 17, 21	syl2anc 411	. . . 4 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < 𝐵) → 𝐵 ≤ sup({𝐴, 𝐵}, ℝ^, < ))
23	16, 17, 19, 20, 22	xrltletrd 10046	. . 3 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ 𝐶 < 𝐵) → 𝐶 < sup({𝐴, 𝐵}, ℝ^, < ))
24	15, 23	jaodan 804	. 2 ⊢ (((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) ∧ (𝐶 < 𝐴 ∨ 𝐶 < 𝐵)) → 𝐶 < sup({𝐴, 𝐵}, ℝ^, < ))
25	6, 24	impbida 600	1 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^) → (𝐶 < sup({𝐴, 𝐵}, ℝ^, < ) ↔ (𝐶 < 𝐴 ∨ 𝐶 < 𝐵)))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∨ wo 715 ∧ w3a 1004 ∈ wcel 2202 {cpr 3670 class class class wbr 4088 supcsup 7181 ℝ^*cxr 8213 < clt 8214 ≤ cle 8215

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4204 ax-sep 4207 ax-nul 4215 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-iinf 4686 ax-cnex 8123 ax-resscn 8124 ax-1cn 8125 ax-1re 8126 ax-icn 8127 ax-addcl 8128 ax-addrcl 8129 ax-mulcl 8130 ax-mulrcl 8131 ax-addcom 8132 ax-mulcom 8133 ax-addass 8134 ax-mulass 8135 ax-distr 8136 ax-i2m1 8137 ax-0lt1 8138 ax-1rid 8139 ax-0id 8140 ax-rnegex 8141 ax-precex 8142 ax-cnre 8143 ax-pre-ltirr 8144 ax-pre-ltwlin 8145 ax-pre-lttrn 8146 ax-pre-apti 8147 ax-pre-ltadd 8148 ax-pre-mulgt0 8149 ax-pre-mulext 8150 ax-arch 8151 ax-caucvg 8152

This theorem depends on definitions: df-bi 117 df-dc 842 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-reu 2517 df-rmo 2518 df-rab 2519 df-v 2804 df-sbc 3032 df-csb 3128 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-if 3606 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-iun 3972 df-br 4089 df-opab 4151 df-mpt 4152 df-tr 4188 df-id 4390 df-po 4393 df-iso 4394 df-iord 4463 df-on 4465 df-ilim 4466 df-suc 4468 df-iom 4689 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-f1 5331 df-fo 5332 df-f1o 5333 df-fv 5334 df-riota 5971 df-ov 6021 df-oprab 6022 df-mpo 6023 df-1st 6303 df-2nd 6304 df-recs 6471 df-frec 6557 df-sup 7183 df-pnf 8216 df-mnf 8217 df-xr 8218 df-ltxr 8219 df-le 8220 df-sub 8352 df-neg 8353 df-reap 8755 df-ap 8762 df-div 8853 df-inn 9144 df-2 9202 df-3 9203 df-4 9204 df-n0 9403 df-z 9480 df-uz 9756 df-rp 9889 df-seqfrec 10711 df-exp 10802 df-cj 11404 df-re 11405 df-im 11406 df-rsqrt 11560 df-abs 11561

This theorem is referenced by: xrmaxlesup 11821 xrmaxaddlem 11822 xrmaxadd 11823 xrminltinf 11834

W3C validator