Theorem smores 5907

Description: A strictly monotone function restricted to an ordinal remains strictly monotone. (Contributed by Andrew Salmon, 16-Nov-2011.) (Proof shortened by Mario Carneiro, 5-Dec-2016.)

Assertion

Ref	Expression
smores	⊢ ((Smo 𝐴 ∧ 𝐵 ∈ dom 𝐴) → Smo (𝐴 ↾ 𝐵))

Proof of Theorem smores

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		funres 4941	. . . . . . . 8 ⊢ (Fun 𝐴 → Fun (𝐴 ↾ 𝐵))
2		funfn 4931	. . . . . . . 8 ⊢ (Fun 𝐴 ↔ 𝐴 Fn dom 𝐴)
3		funfn 4931	. . . . . . . 8 ⊢ (Fun (𝐴 ↾ 𝐵) ↔ (𝐴 ↾ 𝐵) Fn dom (𝐴 ↾ 𝐵))
4	1, 2, 3	3imtr3i 189	. . . . . . 7 ⊢ (𝐴 Fn dom 𝐴 → (𝐴 ↾ 𝐵) Fn dom (𝐴 ↾ 𝐵))
5		resss 4635	. . . . . . . . 9 ⊢ (𝐴 ↾ 𝐵) ⊆ 𝐴
6		rnss 4564	. . . . . . . . 9 ⊢ ((𝐴 ↾ 𝐵) ⊆ 𝐴 → ran (𝐴 ↾ 𝐵) ⊆ ran 𝐴)
7	5, 6	ax-mp 7	. . . . . . . 8 ⊢ ran (𝐴 ↾ 𝐵) ⊆ ran 𝐴
8		sstr 2953	. . . . . . . 8 ⊢ ((ran (𝐴 ↾ 𝐵) ⊆ ran 𝐴 ∧ ran 𝐴 ⊆ On) → ran (𝐴 ↾ 𝐵) ⊆ On)
9	7, 8	mpan 400	. . . . . . 7 ⊢ (ran 𝐴 ⊆ On → ran (𝐴 ↾ 𝐵) ⊆ On)
10	4, 9	anim12i 321	. . . . . 6 ⊢ ((𝐴 Fn dom 𝐴 ∧ ran 𝐴 ⊆ On) → ((𝐴 ↾ 𝐵) Fn dom (𝐴 ↾ 𝐵) ∧ ran (𝐴 ↾ 𝐵) ⊆ On))
11		df-f 4906	. . . . . 6 ⊢ (𝐴:dom 𝐴⟶On ↔ (𝐴 Fn dom 𝐴 ∧ ran 𝐴 ⊆ On))
12		df-f 4906	. . . . . 6 ⊢ ((𝐴 ↾ 𝐵):dom (𝐴 ↾ 𝐵)⟶On ↔ ((𝐴 ↾ 𝐵) Fn dom (𝐴 ↾ 𝐵) ∧ ran (𝐴 ↾ 𝐵) ⊆ On))
13	10, 11, 12	3imtr4i 190	. . . . 5 ⊢ (𝐴:dom 𝐴⟶On → (𝐴 ↾ 𝐵):dom (𝐴 ↾ 𝐵)⟶On)
14	13	a1i 9	. . . 4 ⊢ (𝐵 ∈ dom 𝐴 → (𝐴:dom 𝐴⟶On → (𝐴 ↾ 𝐵):dom (𝐴 ↾ 𝐵)⟶On))
15		ordelord 4118	. . . . . . 7 ⊢ ((Ord dom 𝐴 ∧ 𝐵 ∈ dom 𝐴) → Ord 𝐵)
16	15	expcom 109	. . . . . 6 ⊢ (𝐵 ∈ dom 𝐴 → (Ord dom 𝐴 → Ord 𝐵))
17		ordin 4122	. . . . . . 7 ⊢ ((Ord 𝐵 ∧ Ord dom 𝐴) → Ord (𝐵 ∩ dom 𝐴))
18	17	ex 108	. . . . . 6 ⊢ (Ord 𝐵 → (Ord dom 𝐴 → Ord (𝐵 ∩ dom 𝐴)))
19	16, 18	syli 33	. . . . 5 ⊢ (𝐵 ∈ dom 𝐴 → (Ord dom 𝐴 → Ord (𝐵 ∩ dom 𝐴)))
20		dmres 4632	. . . . . 6 ⊢ dom (𝐴 ↾ 𝐵) = (𝐵 ∩ dom 𝐴)
21		ordeq 4109	. . . . . 6 ⊢ (dom (𝐴 ↾ 𝐵) = (𝐵 ∩ dom 𝐴) → (Ord dom (𝐴 ↾ 𝐵) ↔ Ord (𝐵 ∩ dom 𝐴)))
22	20, 21	ax-mp 7	. . . . 5 ⊢ (Ord dom (𝐴 ↾ 𝐵) ↔ Ord (𝐵 ∩ dom 𝐴))
23	19, 22	syl6ibr 151	. . . 4 ⊢ (𝐵 ∈ dom 𝐴 → (Ord dom 𝐴 → Ord dom (𝐴 ↾ 𝐵)))
24		dmss 4534	. . . . . . . . 9 ⊢ ((𝐴 ↾ 𝐵) ⊆ 𝐴 → dom (𝐴 ↾ 𝐵) ⊆ dom 𝐴)
25	5, 24	ax-mp 7	. . . . . . . 8 ⊢ dom (𝐴 ↾ 𝐵) ⊆ dom 𝐴
26		ssralv 3004	. . . . . . . 8 ⊢ (dom (𝐴 ↾ 𝐵) ⊆ dom 𝐴 → (∀𝑥 ∈ dom 𝐴∀𝑦 ∈ dom 𝐴(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)) → ∀𝑥 ∈ dom (𝐴 ↾ 𝐵)∀𝑦 ∈ dom 𝐴(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦))))
27	25, 26	ax-mp 7	. . . . . . 7 ⊢ (∀𝑥 ∈ dom 𝐴∀𝑦 ∈ dom 𝐴(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)) → ∀𝑥 ∈ dom (𝐴 ↾ 𝐵)∀𝑦 ∈ dom 𝐴(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)))
28		ssralv 3004	. . . . . . . . 9 ⊢ (dom (𝐴 ↾ 𝐵) ⊆ dom 𝐴 → (∀𝑦 ∈ dom 𝐴(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)) → ∀𝑦 ∈ dom (𝐴 ↾ 𝐵)(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦))))
29	25, 28	ax-mp 7	. . . . . . . 8 ⊢ (∀𝑦 ∈ dom 𝐴(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)) → ∀𝑦 ∈ dom (𝐴 ↾ 𝐵)(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)))
30	29	ralimi 2384	. . . . . . 7 ⊢ (∀𝑥 ∈ dom (𝐴 ↾ 𝐵)∀𝑦 ∈ dom 𝐴(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)) → ∀𝑥 ∈ dom (𝐴 ↾ 𝐵)∀𝑦 ∈ dom (𝐴 ↾ 𝐵)(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)))
31	27, 30	syl 14	. . . . . 6 ⊢ (∀𝑥 ∈ dom 𝐴∀𝑦 ∈ dom 𝐴(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)) → ∀𝑥 ∈ dom (𝐴 ↾ 𝐵)∀𝑦 ∈ dom (𝐴 ↾ 𝐵)(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)))
32		inss1 3157	. . . . . . . . . . . . 13 ⊢ (𝐵 ∩ dom 𝐴) ⊆ 𝐵
33	20, 32	eqsstri 2975	. . . . . . . . . . . 12 ⊢ dom (𝐴 ↾ 𝐵) ⊆ 𝐵
34		simpl 102	. . . . . . . . . . . 12 ⊢ ((𝑥 ∈ dom (𝐴 ↾ 𝐵) ∧ 𝑦 ∈ dom (𝐴 ↾ 𝐵)) → 𝑥 ∈ dom (𝐴 ↾ 𝐵))
35	33, 34	sseldi 2943	. . . . . . . . . . 11 ⊢ ((𝑥 ∈ dom (𝐴 ↾ 𝐵) ∧ 𝑦 ∈ dom (𝐴 ↾ 𝐵)) → 𝑥 ∈ 𝐵)
36		fvres 5198	. . . . . . . . . . 11 ⊢ (𝑥 ∈ 𝐵 → ((𝐴 ↾ 𝐵)‘𝑥) = (𝐴‘𝑥))
37	35, 36	syl 14	. . . . . . . . . 10 ⊢ ((𝑥 ∈ dom (𝐴 ↾ 𝐵) ∧ 𝑦 ∈ dom (𝐴 ↾ 𝐵)) → ((𝐴 ↾ 𝐵)‘𝑥) = (𝐴‘𝑥))
38		simpr 103	. . . . . . . . . . . 12 ⊢ ((𝑥 ∈ dom (𝐴 ↾ 𝐵) ∧ 𝑦 ∈ dom (𝐴 ↾ 𝐵)) → 𝑦 ∈ dom (𝐴 ↾ 𝐵))
39	33, 38	sseldi 2943	. . . . . . . . . . 11 ⊢ ((𝑥 ∈ dom (𝐴 ↾ 𝐵) ∧ 𝑦 ∈ dom (𝐴 ↾ 𝐵)) → 𝑦 ∈ 𝐵)
40		fvres 5198	. . . . . . . . . . 11 ⊢ (𝑦 ∈ 𝐵 → ((𝐴 ↾ 𝐵)‘𝑦) = (𝐴‘𝑦))
41	39, 40	syl 14	. . . . . . . . . 10 ⊢ ((𝑥 ∈ dom (𝐴 ↾ 𝐵) ∧ 𝑦 ∈ dom (𝐴 ↾ 𝐵)) → ((𝐴 ↾ 𝐵)‘𝑦) = (𝐴‘𝑦))
42	37, 41	eleq12d 2108	. . . . . . . . 9 ⊢ ((𝑥 ∈ dom (𝐴 ↾ 𝐵) ∧ 𝑦 ∈ dom (𝐴 ↾ 𝐵)) → (((𝐴 ↾ 𝐵)‘𝑥) ∈ ((𝐴 ↾ 𝐵)‘𝑦) ↔ (𝐴‘𝑥) ∈ (𝐴‘𝑦)))
43	42	imbi2d 219	. . . . . . . 8 ⊢ ((𝑥 ∈ dom (𝐴 ↾ 𝐵) ∧ 𝑦 ∈ dom (𝐴 ↾ 𝐵)) → ((𝑥 ∈ 𝑦 → ((𝐴 ↾ 𝐵)‘𝑥) ∈ ((𝐴 ↾ 𝐵)‘𝑦)) ↔ (𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦))))
44	43	ralbidva 2322	. . . . . . 7 ⊢ (𝑥 ∈ dom (𝐴 ↾ 𝐵) → (∀𝑦 ∈ dom (𝐴 ↾ 𝐵)(𝑥 ∈ 𝑦 → ((𝐴 ↾ 𝐵)‘𝑥) ∈ ((𝐴 ↾ 𝐵)‘𝑦)) ↔ ∀𝑦 ∈ dom (𝐴 ↾ 𝐵)(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦))))
45	44	ralbiia 2338	. . . . . 6 ⊢ (∀𝑥 ∈ dom (𝐴 ↾ 𝐵)∀𝑦 ∈ dom (𝐴 ↾ 𝐵)(𝑥 ∈ 𝑦 → ((𝐴 ↾ 𝐵)‘𝑥) ∈ ((𝐴 ↾ 𝐵)‘𝑦)) ↔ ∀𝑥 ∈ dom (𝐴 ↾ 𝐵)∀𝑦 ∈ dom (𝐴 ↾ 𝐵)(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)))
46	31, 45	sylibr 137	. . . . 5 ⊢ (∀𝑥 ∈ dom 𝐴∀𝑦 ∈ dom 𝐴(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)) → ∀𝑥 ∈ dom (𝐴 ↾ 𝐵)∀𝑦 ∈ dom (𝐴 ↾ 𝐵)(𝑥 ∈ 𝑦 → ((𝐴 ↾ 𝐵)‘𝑥) ∈ ((𝐴 ↾ 𝐵)‘𝑦)))
47	46	a1i 9	. . . 4 ⊢ (𝐵 ∈ dom 𝐴 → (∀𝑥 ∈ dom 𝐴∀𝑦 ∈ dom 𝐴(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦)) → ∀𝑥 ∈ dom (𝐴 ↾ 𝐵)∀𝑦 ∈ dom (𝐴 ↾ 𝐵)(𝑥 ∈ 𝑦 → ((𝐴 ↾ 𝐵)‘𝑥) ∈ ((𝐴 ↾ 𝐵)‘𝑦))))
48	14, 23, 47	3anim123d 1214	. . 3 ⊢ (𝐵 ∈ dom 𝐴 → ((𝐴:dom 𝐴⟶On ∧ Ord dom 𝐴 ∧ ∀𝑥 ∈ dom 𝐴∀𝑦 ∈ dom 𝐴(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦))) → ((𝐴 ↾ 𝐵):dom (𝐴 ↾ 𝐵)⟶On ∧ Ord dom (𝐴 ↾ 𝐵) ∧ ∀𝑥 ∈ dom (𝐴 ↾ 𝐵)∀𝑦 ∈ dom (𝐴 ↾ 𝐵)(𝑥 ∈ 𝑦 → ((𝐴 ↾ 𝐵)‘𝑥) ∈ ((𝐴 ↾ 𝐵)‘𝑦)))))
49		df-smo 5901	. . 3 ⊢ (Smo 𝐴 ↔ (𝐴:dom 𝐴⟶On ∧ Ord dom 𝐴 ∧ ∀𝑥 ∈ dom 𝐴∀𝑦 ∈ dom 𝐴(𝑥 ∈ 𝑦 → (𝐴‘𝑥) ∈ (𝐴‘𝑦))))
50		df-smo 5901	. . 3 ⊢ (Smo (𝐴 ↾ 𝐵) ↔ ((𝐴 ↾ 𝐵):dom (𝐴 ↾ 𝐵)⟶On ∧ Ord dom (𝐴 ↾ 𝐵) ∧ ∀𝑥 ∈ dom (𝐴 ↾ 𝐵)∀𝑦 ∈ dom (𝐴 ↾ 𝐵)(𝑥 ∈ 𝑦 → ((𝐴 ↾ 𝐵)‘𝑥) ∈ ((𝐴 ↾ 𝐵)‘𝑦))))
51	48, 49, 50	3imtr4g 194	. 2 ⊢ (𝐵 ∈ dom 𝐴 → (Smo 𝐴 → Smo (𝐴 ↾ 𝐵)))
52	51	impcom 116	1 ⊢ ((Smo 𝐴 ∧ 𝐵 ∈ dom 𝐴) → Smo (𝐴 ↾ 𝐵))

Syntax hints:   → wi 4   ∧ wa 97   ↔ wb 98   ∧ w3a 885   = wceq 1243   ∈ wcel 1393  ∀wral 2306   ∩ cin 2916   ⊆ wss 2917  Ord word 4099  Oncon0 4100  dom cdm 4345  ran crn 4346   ↾ cres 4347  Fun wfun 4896   Fn wfn 4897  ⟶wf 4898  ‘cfv 4902  Smo wsmo 5900

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-14 1405  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022  ax-sep 3875  ax-pow 3927  ax-pr 3944

This theorem depends on definitions:  df-bi 110  df-3an 887  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-ral 2311  df-rex 2312  df-v 2559  df-un 2922  df-in 2924  df-ss 2931  df-pw 3361  df-sn 3381  df-pr 3382  df-op 3384  df-uni 3581  df-br 3765  df-opab 3819  df-tr 3855  df-iord 4103  df-xp 4351  df-rel 4352  df-cnv 4353  df-co 4354  df-dm 4355  df-rn 4356  df-res 4357  df-iota 4867  df-fun 4904  df-fn 4905  df-f 4906  df-fv 4910  df-smo 5901

This theorem is referenced by:  smores3  5908