ressprs - Mathbox for Thierry Arnoux

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Theorem ressprs 32711

Description: The restriction of a proset is a proset. (Contributed by Thierry Arnoux, 11-Sep-2015.)

**Hypothesis**
Ref	Expression
ressprs.b	⊢ 𝐵 = (Base‘𝐾)

**Assertion**
Ref	Expression
ressprs	⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (𝐾 ↾_s 𝐴) ∈ Proset )

Proof of Theorem ressprs Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ovexd 7461	. . 3 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (𝐾 ↾_s 𝐴) ∈ V)
2		simp-4l 781	. . . . . . . 8 ⊢ (((((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) ∧ 𝑥 ∈ 𝐴) ∧ 𝑦 ∈ 𝐴) ∧ 𝑧 ∈ 𝐴) → 𝐾 ∈ Proset )
3		simp-4r 782	. . . . . . . . 9 ⊢ (((((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) ∧ 𝑥 ∈ 𝐴) ∧ 𝑦 ∈ 𝐴) ∧ 𝑧 ∈ 𝐴) → 𝐴 ⊆ 𝐵)
4		simpllr 774	. . . . . . . . 9 ⊢ (((((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) ∧ 𝑥 ∈ 𝐴) ∧ 𝑦 ∈ 𝐴) ∧ 𝑧 ∈ 𝐴) → 𝑥 ∈ 𝐴)
5	3, 4	sseldd 3983	. . . . . . . 8 ⊢ (((((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) ∧ 𝑥 ∈ 𝐴) ∧ 𝑦 ∈ 𝐴) ∧ 𝑧 ∈ 𝐴) → 𝑥 ∈ 𝐵)
6	2, 5	jca 510	. . . . . . 7 ⊢ (((((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) ∧ 𝑥 ∈ 𝐴) ∧ 𝑦 ∈ 𝐴) ∧ 𝑧 ∈ 𝐴) → (𝐾 ∈ Proset ∧ 𝑥 ∈ 𝐵))
7		simplr 767	. . . . . . . 8 ⊢ (((((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) ∧ 𝑥 ∈ 𝐴) ∧ 𝑦 ∈ 𝐴) ∧ 𝑧 ∈ 𝐴) → 𝑦 ∈ 𝐴)
8	3, 7	sseldd 3983	. . . . . . 7 ⊢ (((((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) ∧ 𝑥 ∈ 𝐴) ∧ 𝑦 ∈ 𝐴) ∧ 𝑧 ∈ 𝐴) → 𝑦 ∈ 𝐵)
9		simpr 483	. . . . . . . 8 ⊢ (((((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) ∧ 𝑥 ∈ 𝐴) ∧ 𝑦 ∈ 𝐴) ∧ 𝑧 ∈ 𝐴) → 𝑧 ∈ 𝐴)
10	3, 9	sseldd 3983	. . . . . . 7 ⊢ (((((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) ∧ 𝑥 ∈ 𝐴) ∧ 𝑦 ∈ 𝐴) ∧ 𝑧 ∈ 𝐴) → 𝑧 ∈ 𝐵)
11		ressprs.b	. . . . . . . . . . . 12 ⊢ 𝐵 = (Base‘𝐾)
12		eqid 2728	. . . . . . . . . . . 12 ⊢ (le‘𝐾) = (le‘𝐾)
13	11, 12	isprs 18296	. . . . . . . . . . 11 ⊢ (𝐾 ∈ Proset ↔ (𝐾 ∈ V ∧ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧))))
14	13	simprbi 495	. . . . . . . . . 10 ⊢ (𝐾 ∈ Proset → ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧)))
15	14	r19.21bi 3246	. . . . . . . . 9 ⊢ ((𝐾 ∈ Proset ∧ 𝑥 ∈ 𝐵) → ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧)))
16	15	r19.21bi 3246	. . . . . . . 8 ⊢ (((𝐾 ∈ Proset ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐵) → ∀𝑧 ∈ 𝐵 (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧)))
17	16	r19.21bi 3246	. . . . . . 7 ⊢ ((((𝐾 ∈ Proset ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐵) ∧ 𝑧 ∈ 𝐵) → (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧)))
18	6, 8, 10, 17	syl21anc 836	. . . . . 6 ⊢ (((((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) ∧ 𝑥 ∈ 𝐴) ∧ 𝑦 ∈ 𝐴) ∧ 𝑧 ∈ 𝐴) → (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧)))
19	18	ralrimiva 3143	. . . . 5 ⊢ ((((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) ∧ 𝑥 ∈ 𝐴) ∧ 𝑦 ∈ 𝐴) → ∀𝑧 ∈ 𝐴 (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧)))
20	19	ralrimiva 3143	. . . 4 ⊢ (((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) ∧ 𝑥 ∈ 𝐴) → ∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐴 (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧)))
21	20	ralrimiva 3143	. . 3 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐴 (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧)))
22		eqid 2728	. . . . . . 7 ⊢ (𝐾 ↾_s 𝐴) = (𝐾 ↾_s 𝐴)
23	22, 11	ressbas2 17225	. . . . . 6 ⊢ (𝐴 ⊆ 𝐵 → 𝐴 = (Base‘(𝐾 ↾_s 𝐴)))
24	23	adantl 480	. . . . 5 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → 𝐴 = (Base‘(𝐾 ↾_s 𝐴)))
25	11	fvexi 6916	. . . . . . . . . . . 12 ⊢ 𝐵 ∈ V
26	25	ssex 5325	. . . . . . . . . . 11 ⊢ (𝐴 ⊆ 𝐵 → 𝐴 ∈ V)
27	22, 12	ressle 17368	. . . . . . . . . . 11 ⊢ (𝐴 ∈ V → (le‘𝐾) = (le‘(𝐾 ↾_s 𝐴)))
28	26, 27	syl 17	. . . . . . . . . 10 ⊢ (𝐴 ⊆ 𝐵 → (le‘𝐾) = (le‘(𝐾 ↾_s 𝐴)))
29	28	adantl 480	. . . . . . . . 9 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (le‘𝐾) = (le‘(𝐾 ↾_s 𝐴)))
30	29	breqd 5163	. . . . . . . 8 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (𝑥(le‘𝐾)𝑥 ↔ 𝑥(le‘(𝐾 ↾_s 𝐴))𝑥))
31	29	breqd 5163	. . . . . . . . . 10 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (𝑥(le‘𝐾)𝑦 ↔ 𝑥(le‘(𝐾 ↾_s 𝐴))𝑦))
32	29	breqd 5163	. . . . . . . . . 10 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (𝑦(le‘𝐾)𝑧 ↔ 𝑦(le‘(𝐾 ↾_s 𝐴))𝑧))
33	31, 32	anbi12d 630	. . . . . . . . 9 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) ↔ (𝑥(le‘(𝐾 ↾_s 𝐴))𝑦 ∧ 𝑦(le‘(𝐾 ↾_s 𝐴))𝑧)))
34	29	breqd 5163	. . . . . . . . 9 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (𝑥(le‘𝐾)𝑧 ↔ 𝑥(le‘(𝐾 ↾_s 𝐴))𝑧))
35	33, 34	imbi12d 343	. . . . . . . 8 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧) ↔ ((𝑥(le‘(𝐾 ↾_s 𝐴))𝑦 ∧ 𝑦(le‘(𝐾 ↾_s 𝐴))𝑧) → 𝑥(le‘(𝐾 ↾_s 𝐴))𝑧)))
36	30, 35	anbi12d 630	. . . . . . 7 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → ((𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧)) ↔ (𝑥(le‘(𝐾 ↾_s 𝐴))𝑥 ∧ ((𝑥(le‘(𝐾 ↾_s 𝐴))𝑦 ∧ 𝑦(le‘(𝐾 ↾_s 𝐴))𝑧) → 𝑥(le‘(𝐾 ↾_s 𝐴))𝑧))))
37	24, 36	raleqbidv 3340	. . . . . 6 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (∀𝑧 ∈ 𝐴 (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧)) ↔ ∀𝑧 ∈ (Base‘(𝐾 ↾_s 𝐴))(𝑥(le‘(𝐾 ↾_s 𝐴))𝑥 ∧ ((𝑥(le‘(𝐾 ↾_s 𝐴))𝑦 ∧ 𝑦(le‘(𝐾 ↾_s 𝐴))𝑧) → 𝑥(le‘(𝐾 ↾_s 𝐴))𝑧))))
38	24, 37	raleqbidv 3340	. . . . 5 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐴 (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧)) ↔ ∀𝑦 ∈ (Base‘(𝐾 ↾_s 𝐴))∀𝑧 ∈ (Base‘(𝐾 ↾_s 𝐴))(𝑥(le‘(𝐾 ↾_s 𝐴))𝑥 ∧ ((𝑥(le‘(𝐾 ↾_s 𝐴))𝑦 ∧ 𝑦(le‘(𝐾 ↾_s 𝐴))𝑧) → 𝑥(le‘(𝐾 ↾_s 𝐴))𝑧))))
39	24, 38	raleqbidv 3340	. . . 4 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐴 (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧)) ↔ ∀𝑥 ∈ (Base‘(𝐾 ↾_s 𝐴))∀𝑦 ∈ (Base‘(𝐾 ↾_s 𝐴))∀𝑧 ∈ (Base‘(𝐾 ↾_s 𝐴))(𝑥(le‘(𝐾 ↾_s 𝐴))𝑥 ∧ ((𝑥(le‘(𝐾 ↾_s 𝐴))𝑦 ∧ 𝑦(le‘(𝐾 ↾_s 𝐴))𝑧) → 𝑥(le‘(𝐾 ↾_s 𝐴))𝑧))))
40	39	anbi2d 628	. . 3 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (((𝐾 ↾_s 𝐴) ∈ V ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 ∀𝑧 ∈ 𝐴 (𝑥(le‘𝐾)𝑥 ∧ ((𝑥(le‘𝐾)𝑦 ∧ 𝑦(le‘𝐾)𝑧) → 𝑥(le‘𝐾)𝑧))) ↔ ((𝐾 ↾_s 𝐴) ∈ V ∧ ∀𝑥 ∈ (Base‘(𝐾 ↾_s 𝐴))∀𝑦 ∈ (Base‘(𝐾 ↾_s 𝐴))∀𝑧 ∈ (Base‘(𝐾 ↾_s 𝐴))(𝑥(le‘(𝐾 ↾_s 𝐴))𝑥 ∧ ((𝑥(le‘(𝐾 ↾_s 𝐴))𝑦 ∧ 𝑦(le‘(𝐾 ↾_s 𝐴))𝑧) → 𝑥(le‘(𝐾 ↾_s 𝐴))𝑧)))))
41	1, 21, 40	mpbi2and 710	. 2 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → ((𝐾 ↾_s 𝐴) ∈ V ∧ ∀𝑥 ∈ (Base‘(𝐾 ↾_s 𝐴))∀𝑦 ∈ (Base‘(𝐾 ↾_s 𝐴))∀𝑧 ∈ (Base‘(𝐾 ↾_s 𝐴))(𝑥(le‘(𝐾 ↾_s 𝐴))𝑥 ∧ ((𝑥(le‘(𝐾 ↾_s 𝐴))𝑦 ∧ 𝑦(le‘(𝐾 ↾_s 𝐴))𝑧) → 𝑥(le‘(𝐾 ↾_s 𝐴))𝑧))))
42		eqid 2728	. . 3 ⊢ (Base‘(𝐾 ↾_s 𝐴)) = (Base‘(𝐾 ↾_s 𝐴))
43		eqid 2728	. . 3 ⊢ (le‘(𝐾 ↾_s 𝐴)) = (le‘(𝐾 ↾_s 𝐴))
44	42, 43	isprs 18296	. 2 ⊢ ((𝐾 ↾_s 𝐴) ∈ Proset ↔ ((𝐾 ↾_s 𝐴) ∈ V ∧ ∀𝑥 ∈ (Base‘(𝐾 ↾_s 𝐴))∀𝑦 ∈ (Base‘(𝐾 ↾_s 𝐴))∀𝑧 ∈ (Base‘(𝐾 ↾_s 𝐴))(𝑥(le‘(𝐾 ↾_s 𝐴))𝑥 ∧ ((𝑥(le‘(𝐾 ↾_s 𝐴))𝑦 ∧ 𝑦(le‘(𝐾 ↾_s 𝐴))𝑧) → 𝑥(le‘(𝐾 ↾_s 𝐴))𝑧))))
45	41, 44	sylibr 233	1 ⊢ ((𝐾 ∈ Proset ∧ 𝐴 ⊆ 𝐵) → (𝐾 ↾_s 𝐴) ∈ Proset )

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 394 = wceq 1533 ∈ wcel 2098 ∀wral 3058 Vcvv 3473 ⊆ wss 3949 class class class wbr 5152 ‘cfv 6553 (class class class)co 7426 Basecbs 17187 ↾_s cress 17216 lecple 17247 Proset cproset 18292

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2699 ax-sep 5303 ax-nul 5310 ax-pow 5369 ax-pr 5433 ax-un 7746 ax-cnex 11202 ax-resscn 11203 ax-1cn 11204 ax-icn 11205 ax-addcl 11206 ax-addrcl 11207 ax-mulcl 11208 ax-mulrcl 11209 ax-mulcom 11210 ax-addass 11211 ax-mulass 11212 ax-distr 11213 ax-i2m1 11214 ax-1ne0 11215 ax-1rid 11216 ax-rnegex 11217 ax-rrecex 11218 ax-cnre 11219 ax-pre-lttri 11220 ax-pre-lttrn 11221 ax-pre-ltadd 11222 ax-pre-mulgt0 11223

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2529 df-eu 2558 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-reu 3375 df-rab 3431 df-v 3475 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4327 df-if 4533 df-pw 4608 df-sn 4633 df-pr 4635 df-op 4639 df-uni 4913 df-iun 5002 df-br 5153 df-opab 5215 df-mpt 5236 df-tr 5270 df-id 5580 df-eprel 5586 df-po 5594 df-so 5595 df-fr 5637 df-we 5639 df-xp 5688 df-rel 5689 df-cnv 5690 df-co 5691 df-dm 5692 df-rn 5693 df-res 5694 df-ima 5695 df-pred 6310 df-ord 6377 df-on 6378 df-lim 6379 df-suc 6380 df-iota 6505 df-fun 6555 df-fn 6556 df-f 6557 df-f1 6558 df-fo 6559 df-f1o 6560 df-fv 6561 df-riota 7382 df-ov 7429 df-oprab 7430 df-mpo 7431 df-om 7877 df-2nd 8000 df-frecs 8293 df-wrecs 8324 df-recs 8398 df-rdg 8437 df-er 8731 df-en 8971 df-dom 8972 df-sdom 8973 df-pnf 11288 df-mnf 11289 df-xr 11290 df-ltxr 11291 df-le 11292 df-sub 11484 df-neg 11485 df-nn 12251 df-2 12313 df-3 12314 df-4 12315 df-5 12316 df-6 12317 df-7 12318 df-8 12319 df-9 12320 df-dec 12716 df-sets 17140 df-slot 17158 df-ndx 17170 df-base 17188 df-ress 17217 df-ple 17260 df-proset 18294

This theorem is referenced by: prsssdm 33551 ordtrestNEW 33555 ordtrest2NEW 33557

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