Theorem ldilco 40704

Description: The composition of two lattice automorphisms is a lattice automorphism. (Contributed by NM, 19-Apr-2013.)

Hypotheses

Ref	Expression
ldilco.h	⊢ 𝐻 = (LHyp‘𝐾)
ldilco.d	⊢ 𝐷 = ((LDil‘𝐾)‘𝑊)

Assertion

Ref	Expression
ldilco	⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) → (𝐹 ∘ 𝐺) ∈ 𝐷)

Proof of Theorem ldilco

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		simp1l 1210	. . 3 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) → 𝐾 ∈ 𝑉)
2		ldilco.h	. . . . 5 ⊢ 𝐻 = (LHyp‘𝐾)
3		eqid 2761	. . . . 5 ⊢ (LAut‘𝐾) = (LAut‘𝐾)
4		ldilco.d	. . . . 5 ⊢ 𝐷 = ((LDil‘𝐾)‘𝑊)
5	2, 3, 4	ldillaut 40699	. . . 4 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷) → 𝐹 ∈ (LAut‘𝐾))
6	5	3adant3 1144	. . 3 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) → 𝐹 ∈ (LAut‘𝐾))
7	2, 3, 4	ldillaut 40699	. . . 4 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐺 ∈ 𝐷) → 𝐺 ∈ (LAut‘𝐾))
8	7	3adant2 1143	. . 3 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) → 𝐺 ∈ (LAut‘𝐾))
9	3	lautco 40685	. . 3 ⊢ ((𝐾 ∈ 𝑉 ∧ 𝐹 ∈ (LAut‘𝐾) ∧ 𝐺 ∈ (LAut‘𝐾)) → (𝐹 ∘ 𝐺) ∈ (LAut‘𝐾))
10	1, 6, 8, 9	syl3anc 1389	. 2 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) → (𝐹 ∘ 𝐺) ∈ (LAut‘𝐾))
11		simp11 1216	. . . . . . . 8 ⊢ ((((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) ∧ 𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊) → (𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻))
12		simp13 1218	. . . . . . . 8 ⊢ ((((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) ∧ 𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊) → 𝐺 ∈ 𝐷)
13		eqid 2761	. . . . . . . . 9 ⊢ (Base‘𝐾) = (Base‘𝐾)
14	13, 2, 4	ldil1o 40700	. . . . . . . 8 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐺 ∈ 𝐷) → 𝐺:(Base‘𝐾)–1-1-onto→(Base‘𝐾))
15	11, 12, 14	syl2anc 593	. . . . . . 7 ⊢ ((((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) ∧ 𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊) → 𝐺:(Base‘𝐾)–1-1-onto→(Base‘𝐾))
16		f1of 6802	. . . . . . 7 ⊢ (𝐺:(Base‘𝐾)–1-1-onto→(Base‘𝐾) → 𝐺:(Base‘𝐾)⟶(Base‘𝐾))
17	15, 16	syl 17	. . . . . 6 ⊢ ((((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) ∧ 𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊) → 𝐺:(Base‘𝐾)⟶(Base‘𝐾))
18		simp2 1149	. . . . . 6 ⊢ ((((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) ∧ 𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊) → 𝑥 ∈ (Base‘𝐾))
19		fvco3 6963	. . . . . 6 ⊢ ((𝐺:(Base‘𝐾)⟶(Base‘𝐾) ∧ 𝑥 ∈ (Base‘𝐾)) → ((𝐹 ∘ 𝐺)‘𝑥) = (𝐹‘(𝐺‘𝑥)))
20	17, 18, 19	syl2anc 593	. . . . 5 ⊢ ((((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) ∧ 𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊) → ((𝐹 ∘ 𝐺)‘𝑥) = (𝐹‘(𝐺‘𝑥)))
21		simp3 1150	. . . . . . 7 ⊢ ((((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) ∧ 𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊) → 𝑥(le‘𝐾)𝑊)
22		eqid 2761	. . . . . . . 8 ⊢ (le‘𝐾) = (le‘𝐾)
23	13, 22, 2, 4	ldilval 40701	. . . . . . 7 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐺 ∈ 𝐷 ∧ (𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊)) → (𝐺‘𝑥) = 𝑥)
24	11, 12, 18, 21, 23	syl112anc 1392	. . . . . 6 ⊢ ((((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) ∧ 𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊) → (𝐺‘𝑥) = 𝑥)
25	24	fveq2d 6867	. . . . 5 ⊢ ((((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) ∧ 𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊) → (𝐹‘(𝐺‘𝑥)) = (𝐹‘𝑥))
26		simp12 1217	. . . . . 6 ⊢ ((((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) ∧ 𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊) → 𝐹 ∈ 𝐷)
27	13, 22, 2, 4	ldilval 40701	. . . . . 6 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ (𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊)) → (𝐹‘𝑥) = 𝑥)
28	11, 26, 18, 21, 27	syl112anc 1392	. . . . 5 ⊢ ((((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) ∧ 𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊) → (𝐹‘𝑥) = 𝑥)
29	20, 25, 28	3eqtrd 2800	. . . 4 ⊢ ((((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) ∧ 𝑥 ∈ (Base‘𝐾) ∧ 𝑥(le‘𝐾)𝑊) → ((𝐹 ∘ 𝐺)‘𝑥) = 𝑥)
30	29	3exp 1131	. . 3 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) → (𝑥 ∈ (Base‘𝐾) → (𝑥(le‘𝐾)𝑊 → ((𝐹 ∘ 𝐺)‘𝑥) = 𝑥)))
31	30	ralrimiv 3152	. 2 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) → ∀𝑥 ∈ (Base‘𝐾)(𝑥(le‘𝐾)𝑊 → ((𝐹 ∘ 𝐺)‘𝑥) = 𝑥))
32	13, 22, 2, 3, 4	isldil 40698	. . 3 ⊢ ((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) → ((𝐹 ∘ 𝐺) ∈ 𝐷 ↔ ((𝐹 ∘ 𝐺) ∈ (LAut‘𝐾) ∧ ∀𝑥 ∈ (Base‘𝐾)(𝑥(le‘𝐾)𝑊 → ((𝐹 ∘ 𝐺)‘𝑥) = 𝑥))))
33	32	3ad2ant1 1145	. 2 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) → ((𝐹 ∘ 𝐺) ∈ 𝐷 ↔ ((𝐹 ∘ 𝐺) ∈ (LAut‘𝐾) ∧ ∀𝑥 ∈ (Base‘𝐾)(𝑥(le‘𝐾)𝑊 → ((𝐹 ∘ 𝐺)‘𝑥) = 𝑥))))
34	10, 31, 33	mpbir2and 723	1 ⊢ (((𝐾 ∈ 𝑉 ∧ 𝑊 ∈ 𝐻) ∧ 𝐹 ∈ 𝐷 ∧ 𝐺 ∈ 𝐷) → (𝐹 ∘ 𝐺) ∈ 𝐷)

Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 399   ∧ w3a 1097   = wceq 1559   ∈ wcel 2141  ∀wral 3075   class class class wbr 5099   ∘ ccom 5649  ⟶wf 6513  –1-1-onto→wf1o 6516  ‘cfv 6517  Basecbs 17228  lecple 17276  LHypclh 40572  LAutclaut 40573  LDilcldil 40688

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-rep 5226  ax-sep 5245  ax-nul 5255  ax-pow 5321  ax-pr 5389  ax-un 7714

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-nf 1803  df-sb 2090  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3076  df-rex 3086  df-reu 3367  df-rab 3414  df-v 3455  df-sbc 3745  df-csb 3853  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4582  df-pr 4584  df-op 4588  df-uni 4865  df-iun 4950  df-br 5100  df-opab 5162  df-mpt 5181  df-id 5540  df-xp 5651  df-rel 5652  df-cnv 5653  df-co 5654  df-dm 5655  df-rn 5656  df-res 5657  df-ima 5658  df-iota 6473  df-fun 6519  df-fn 6520  df-f 6521  df-f1 6522  df-fo 6523  df-f1o 6524  df-fv 6525  df-ov 7395  df-oprab 7396  df-mpo 7397  df-map 8805  df-laut 40577  df-ldil 40692

This theorem is referenced by:  ltrnco  41307