Theorem cnfldfun 21327

Description: The field of complex numbers is a function. The proof is much shorter than the proof of cnfldfunALT 21328 by using cnfldstr 21315 and structn0fun 17082: in addition, it must be shown that ∅ ∉ ℂ_fld. (Contributed by AV, 18-Nov-2021.) Revise df-cnfld 21314. (Revised by GG, 31-Mar-2025.)

Assertion

Ref	Expression
cnfldfun	⊢ Fun ℂfld

Proof of Theorem cnfldfun

Dummy variables 𝑣 𝑢 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		cnfldstr 21315	. 2 ⊢ ℂfld Struct ⟨1, ;13⟩
2		structn0fun 17082	. . 3 ⊢ (ℂfld Struct ⟨1, ;13⟩ → Fun (ℂfld ∖ {∅}))
3		fvex 6848	. . . . . . . . . . . . 13 ⊢ (Base‘ndx) ∈ V
4		cnex 11111	. . . . . . . . . . . . 13 ⊢ ℂ ∈ V
5	3, 4	opnzi 5423	. . . . . . . . . . . 12 ⊢ ⟨(Base‘ndx), ℂ⟩ ≠ ∅
6	5	nesymi 2990	. . . . . . . . . . 11 ⊢ ¬ ∅ = ⟨(Base‘ndx), ℂ⟩
7		fvex 6848	. . . . . . . . . . . . 13 ⊢ (+g‘ndx) ∈ V
8		mpoaddex 12905	. . . . . . . . . . . . 13 ⊢ (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣)) ∈ V
9	7, 8	opnzi 5423	. . . . . . . . . . . 12 ⊢ ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩ ≠ ∅
10	9	nesymi 2990	. . . . . . . . . . 11 ⊢ ¬ ∅ = ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩
11		fvex 6848	. . . . . . . . . . . . 13 ⊢ (.r‘ndx) ∈ V
12		mpomulex 12907	. . . . . . . . . . . . 13 ⊢ (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣)) ∈ V
13	11, 12	opnzi 5423	. . . . . . . . . . . 12 ⊢ ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩ ≠ ∅
14	13	nesymi 2990	. . . . . . . . . . 11 ⊢ ¬ ∅ = ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩
15		3ioran 1106	. . . . . . . . . . . 12 ⊢ (¬ (∅ = ⟨(Base‘ndx), ℂ⟩ ∨ ∅ = ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩ ∨ ∅ = ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩) ↔ (¬ ∅ = ⟨(Base‘ndx), ℂ⟩ ∧ ¬ ∅ = ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩ ∧ ¬ ∅ = ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩))
16		0ex 5253	. . . . . . . . . . . . 13 ⊢ ∅ ∈ V
17	16	eltp 4647	. . . . . . . . . . . 12 ⊢ (∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ↔ (∅ = ⟨(Base‘ndx), ℂ⟩ ∨ ∅ = ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩ ∨ ∅ = ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩))
18	15, 17	xchnxbir 333	. . . . . . . . . . 11 ⊢ (¬ ∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ↔ (¬ ∅ = ⟨(Base‘ndx), ℂ⟩ ∧ ¬ ∅ = ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩ ∧ ¬ ∅ = ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩))
19	6, 10, 14, 18	mpbir3an 1343	. . . . . . . . . 10 ⊢ ¬ ∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩}
20		fvex 6848	. . . . . . . . . . . . 13 ⊢ (*𝑟‘ndx) ∈ V
21		cjf 15031	. . . . . . . . . . . . . 14 ⊢ ∗:ℂ⟶ℂ
22		fex 7174	. . . . . . . . . . . . . 14 ⊢ ((∗:ℂ⟶ℂ ∧ ℂ ∈ V) → ∗ ∈ V)
23	21, 4, 22	mp2an 693	. . . . . . . . . . . . 13 ⊢ ∗ ∈ V
24	20, 23	opnzi 5423	. . . . . . . . . . . 12 ⊢ ⟨(*𝑟‘ndx), ∗⟩ ≠ ∅
25	24	necomi 2987	. . . . . . . . . . 11 ⊢ ∅ ≠ ⟨(*𝑟‘ndx), ∗⟩
26		nelsn 4624	. . . . . . . . . . 11 ⊢ (∅ ≠ ⟨(*𝑟‘ndx), ∗⟩ → ¬ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩})
27	25, 26	ax-mp 5	. . . . . . . . . 10 ⊢ ¬ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}
28	19, 27	pm3.2i 470	. . . . . . . . 9 ⊢ (¬ ∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∧ ¬ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩})
29		fvex 6848	. . . . . . . . . . . . . 14 ⊢ (TopSet‘ndx) ∈ V
30		fvex 6848	. . . . . . . . . . . . . 14 ⊢ (MetOpen‘(abs ∘ − )) ∈ V
31	29, 30	opnzi 5423	. . . . . . . . . . . . 13 ⊢ ⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩ ≠ ∅
32	31	nesymi 2990	. . . . . . . . . . . 12 ⊢ ¬ ∅ = ⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩
33		fvex 6848	. . . . . . . . . . . . . 14 ⊢ (le‘ndx) ∈ V
34		letsr 18520	. . . . . . . . . . . . . . 15 ⊢ ≤ ∈ TosetRel
35	34	elexi 3464	. . . . . . . . . . . . . 14 ⊢ ≤ ∈ V
36	33, 35	opnzi 5423	. . . . . . . . . . . . 13 ⊢ ⟨(le‘ndx), ≤ ⟩ ≠ ∅
37	36	nesymi 2990	. . . . . . . . . . . 12 ⊢ ¬ ∅ = ⟨(le‘ndx), ≤ ⟩
38		fvex 6848	. . . . . . . . . . . . . 14 ⊢ (dist‘ndx) ∈ V
39		absf 15265	. . . . . . . . . . . . . . . 16 ⊢ abs:ℂ⟶ℝ
40		fex 7174	. . . . . . . . . . . . . . . 16 ⊢ ((abs:ℂ⟶ℝ ∧ ℂ ∈ V) → abs ∈ V)
41	39, 4, 40	mp2an 693	. . . . . . . . . . . . . . 15 ⊢ abs ∈ V
42		subf 11386	. . . . . . . . . . . . . . . 16 ⊢ − :(ℂ × ℂ)⟶ℂ
43	4, 4	xpex 7700	. . . . . . . . . . . . . . . 16 ⊢ (ℂ × ℂ) ∈ V
44		fex 7174	. . . . . . . . . . . . . . . 16 ⊢ (( − :(ℂ × ℂ)⟶ℂ ∧ (ℂ × ℂ) ∈ V) → − ∈ V)
45	42, 43, 44	mp2an 693	. . . . . . . . . . . . . . 15 ⊢ − ∈ V
46	41, 45	coex 7874	. . . . . . . . . . . . . 14 ⊢ (abs ∘ − ) ∈ V
47	38, 46	opnzi 5423	. . . . . . . . . . . . 13 ⊢ ⟨(dist‘ndx), (abs ∘ − )⟩ ≠ ∅
48	47	nesymi 2990	. . . . . . . . . . . 12 ⊢ ¬ ∅ = ⟨(dist‘ndx), (abs ∘ − )⟩
49	32, 37, 48	3pm3.2ni 1491	. . . . . . . . . . 11 ⊢ ¬ (∅ = ⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩ ∨ ∅ = ⟨(le‘ndx), ≤ ⟩ ∨ ∅ = ⟨(dist‘ndx), (abs ∘ − )⟩)
50	16	eltp 4647	. . . . . . . . . . 11 ⊢ (∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ↔ (∅ = ⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩ ∨ ∅ = ⟨(le‘ndx), ≤ ⟩ ∨ ∅ = ⟨(dist‘ndx), (abs ∘ − )⟩))
51	49, 50	mtbir 323	. . . . . . . . . 10 ⊢ ¬ ∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩}
52		fvex 6848	. . . . . . . . . . . . 13 ⊢ (UnifSet‘ndx) ∈ V
53		fvex 6848	. . . . . . . . . . . . 13 ⊢ (metUnif‘(abs ∘ − )) ∈ V
54	52, 53	opnzi 5423	. . . . . . . . . . . 12 ⊢ ⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩ ≠ ∅
55	54	necomi 2987	. . . . . . . . . . 11 ⊢ ∅ ≠ ⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩
56		nelsn 4624	. . . . . . . . . . 11 ⊢ (∅ ≠ ⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩ → ¬ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})
57	55, 56	ax-mp 5	. . . . . . . . . 10 ⊢ ¬ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩}
58	51, 57	pm3.2i 470	. . . . . . . . 9 ⊢ (¬ ∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∧ ¬ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})
59	28, 58	pm3.2i 470	. . . . . . . 8 ⊢ ((¬ ∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∧ ¬ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}) ∧ (¬ ∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∧ ¬ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩}))
60		ioran 986	. . . . . . . . 9 ⊢ (¬ ((∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∨ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}) ∨ (∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∨ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})) ↔ (¬ (∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∨ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}) ∧ ¬ (∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∨ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})))
61		ioran 986	. . . . . . . . . 10 ⊢ (¬ (∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∨ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}) ↔ (¬ ∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∧ ¬ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}))
62		ioran 986	. . . . . . . . . 10 ⊢ (¬ (∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∨ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩}) ↔ (¬ ∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∧ ¬ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩}))
63	61, 62	anbi12i 629	. . . . . . . . 9 ⊢ ((¬ (∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∨ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}) ∧ ¬ (∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∨ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})) ↔ ((¬ ∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∧ ¬ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}) ∧ (¬ ∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∧ ¬ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})))
64	60, 63	bitri 275	. . . . . . . 8 ⊢ (¬ ((∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∨ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}) ∨ (∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∨ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})) ↔ ((¬ ∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∧ ¬ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}) ∧ (¬ ∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∧ ¬ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})))
65	59, 64	mpbir 231	. . . . . . 7 ⊢ ¬ ((∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∨ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}) ∨ (∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∨ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩}))
66		df-cnfld 21314	. . . . . . . . 9 ⊢ ℂfld = (({⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∪ {⟨(*𝑟‘ndx), ∗⟩}) ∪ ({⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∪ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩}))
67	66	eleq2i 2829	. . . . . . . 8 ⊢ (∅ ∈ ℂfld ↔ ∅ ∈ (({⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∪ {⟨(*𝑟‘ndx), ∗⟩}) ∪ ({⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∪ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})))
68		elun 4106	. . . . . . . 8 ⊢ (∅ ∈ (({⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∪ {⟨(*𝑟‘ndx), ∗⟩}) ∪ ({⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∪ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})) ↔ (∅ ∈ ({⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∪ {⟨(*𝑟‘ndx), ∗⟩}) ∨ ∅ ∈ ({⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∪ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})))
69		elun 4106	. . . . . . . . 9 ⊢ (∅ ∈ ({⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∪ {⟨(*𝑟‘ndx), ∗⟩}) ↔ (∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∨ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}))
70		elun 4106	. . . . . . . . 9 ⊢ (∅ ∈ ({⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∪ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩}) ↔ (∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∨ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩}))
71	69, 70	orbi12i 915	. . . . . . . 8 ⊢ ((∅ ∈ ({⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∪ {⟨(*𝑟‘ndx), ∗⟩}) ∨ ∅ ∈ ({⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∪ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})) ↔ ((∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∨ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}) ∨ (∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∨ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})))
72	67, 68, 71	3bitri 297	. . . . . . 7 ⊢ (∅ ∈ ℂfld ↔ ((∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∨ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}) ∨ (∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∨ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})))
73	65, 72	mtbir 323	. . . . . 6 ⊢ ¬ ∅ ∈ ℂfld
74		disjsn 4669	. . . . . 6 ⊢ ((ℂfld ∩ {∅}) = ∅ ↔ ¬ ∅ ∈ ℂfld)
75	73, 74	mpbir 231	. . . . 5 ⊢ (ℂfld ∩ {∅}) = ∅
76		disjdif2 4433	. . . . 5 ⊢ ((ℂfld ∩ {∅}) = ∅ → (ℂfld ∖ {∅}) = ℂfld)
77	75, 76	ax-mp 5	. . . 4 ⊢ (ℂfld ∖ {∅}) = ℂfld
78	77	funeqi 6514	. . 3 ⊢ (Fun (ℂfld ∖ {∅}) ↔ Fun ℂfld)
79	2, 78	sylib 218	. 2 ⊢ (ℂfld Struct ⟨1, ;13⟩ → Fun ℂfld)
80	1, 79	ax-mp 5	1 ⊢ Fun ℂfld

Syntax hints:  ¬ wn 3   ∧ wa 395   ∨ wo 848   ∨ w3o 1086   ∧ w3a 1087   = wceq 1542   ∈ wcel 2114   ≠ wne 2933  Vcvv 3441   ∖ cdif 3899   ∪ cun 3900   ∩ cin 3901  ∅c0 4286  {csn 4581  {ctp 4585  ⟨cop 4587   class class class wbr 5099   × cxp 5623   ∘ ccom 5629  Fun wfun 6487  ⟶wf 6489  ‘cfv 6493  (class class class)co 7360   ∈ cmpo 7362  ℂcc 11028  ℝcr 11029  1c1 11031   + caddc 11033   · cmul 11035   ≤ cle 11171   − cmin 11368  3c3 12205  ;cdc 12611  ∗ccj 15023  abscabs 15161   Struct cstr 17077  ndxcnx 17124  Basecbs 17140  +_gcplusg 17181  ._rcmulr 17182  *_𝑟cstv 17183  TopSetcts 17187  lecple 17188  distcds 17190  UnifSetcunif 17191   TosetRel ctsr 18492  MetOpencmopn 21303  metUnifcmetu 21304  ℂ_fldccnfld 21313

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-rep 5225  ax-sep 5242  ax-nul 5252  ax-pow 5311  ax-pr 5378  ax-un 7682  ax-cnex 11086  ax-resscn 11087  ax-1cn 11088  ax-icn 11089  ax-addcl 11090  ax-addrcl 11091  ax-mulcl 11092  ax-mulrcl 11093  ax-mulcom 11094  ax-addass 11095  ax-mulass 11096  ax-distr 11097  ax-i2m1 11098  ax-1ne0 11099  ax-1rid 11100  ax-rnegex 11101  ax-rrecex 11102  ax-cnre 11103  ax-pre-lttri 11104  ax-pre-lttrn 11105  ax-pre-ltadd 11106  ax-pre-mulgt0 11107  ax-pre-sup 11108

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-nel 3038  df-ral 3053  df-rex 3062  df-rmo 3351  df-reu 3352  df-rab 3401  df-v 3443  df-sbc 3742  df-csb 3851  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-pss 3922  df-nul 4287  df-if 4481  df-pw 4557  df-sn 4582  df-pr 4584  df-tp 4586  df-op 4588  df-uni 4865  df-iun 4949  df-br 5100  df-opab 5162  df-mpt 5181  df-tr 5207  df-id 5520  df-eprel 5525  df-po 5533  df-so 5534  df-fr 5578  df-we 5580  df-xp 5631  df-rel 5632  df-cnv 5633  df-co 5634  df-dm 5635  df-rn 5636  df-res 5637  df-ima 5638  df-pred 6260  df-ord 6321  df-on 6322  df-lim 6323  df-suc 6324  df-iota 6449  df-fun 6495  df-fn 6496  df-f 6497  df-f1 6498  df-fo 6499  df-f1o 6500  df-fv 6501  df-riota 7317  df-ov 7363  df-oprab 7364  df-mpo 7365  df-om 7811  df-1st 7935  df-2nd 7936  df-frecs 8225  df-wrecs 8256  df-recs 8305  df-rdg 8343  df-1o 8399  df-er 8637  df-en 8888  df-dom 8889  df-sdom 8890  df-fin 8891  df-sup 9349  df-pnf 11172  df-mnf 11173  df-xr 11174  df-ltxr 11175  df-le 11176  df-sub 11370  df-neg 11371  df-div 11799  df-nn 12150  df-2 12212  df-3 12213  df-4 12214  df-5 12215  df-6 12216  df-7 12217  df-8 12218  df-9 12219  df-n0 12406  df-z 12493  df-dec 12612  df-uz 12756  df-rp 12910  df-fz 13428  df-seq 13929  df-exp 13989  df-cj 15026  df-re 15027  df-im 15028  df-sqrt 15162  df-abs 15163  df-struct 17078  df-slot 17113  df-ndx 17125  df-base 17141  df-plusg 17194  df-mulr 17195  df-starv 17196  df-tset 17200  df-ple 17201  df-ds 17203  df-unif 17204  df-ps 18493  df-tsr 18494  df-cnfld 21314

This theorem is referenced by: (None)