xrltletrd - Intuitionistic Logic Explorer

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Theorem xrltletrd 10003

Description: Transitive law for ordering on extended reals. (Contributed by Mario Carneiro, 23-Aug-2015.)

**Assertion**
Ref	Expression
xrltletrd	⊢ (𝜑 → 𝐴 < 𝐶)

**Proof of Theorem xrltletrd**
Step	Hyp	Ref	Expression
1		xrltletrd.4	. 2 ⊢ (𝜑 → 𝐴 < 𝐵)
2		xrltletrd.5	. 2 ⊢ (𝜑 → 𝐵 ≤ 𝐶)
3		xrlttrd.1	. . 3 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
4		xrlttrd.2	. . 3 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
5		xrlttrd.3	. . 3 ⊢ (𝜑 → 𝐶 ∈ ℝ^*)
6		xrltletr 9999	. . 3 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐶 ∈ ℝ^*) → ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶))
7	3, 4, 5, 6	syl3anc 1271	. 2 ⊢ (𝜑 → ((𝐴 < 𝐵 ∧ 𝐵 ≤ 𝐶) → 𝐴 < 𝐶))
8	1, 2, 7	mp2and 433	1 ⊢ (𝜑 → 𝐴 < 𝐶)

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 ∈ wcel 2200 class class class wbr 4082 ℝ^*cxr 8176 < clt 8177 ≤ cle 8178

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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4201 ax-pow 4257 ax-pr 4292 ax-un 4523 ax-setind 4628 ax-cnex 8086 ax-resscn 8087 ax-pre-ltirr 8107 ax-pre-ltwlin 8108 ax-pre-lttrn 8109

This theorem depends on definitions: df-bi 117 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2801 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3888 df-br 4083 df-opab 4145 df-po 4386 df-iso 4387 df-xp 4724 df-cnv 4726 df-pnf 8179 df-mnf 8180 df-xr 8181 df-ltxr 8182 df-le 8183

This theorem is referenced by: xlt2add 10072 elico2 10129 elicc2 10130 elicore 10481 xrltmaxsup 11763 xblss2ps 15072 xblss2 15073 tgioo 15222