Theorem cnfldfun 21407

Description: The field of complex numbers is a function. The proof is much shorter than the proof of cnfldfunALT 21408 by using cnfldstr 21395 and structn0fun 17159: in addition, it must be shown that ∅ ∉ ℂ_fld. (Contributed by AV, 18-Nov-2021.) Revise df-cnfld 21394. (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 21395	. 2 ⊢ ℂfld Struct ⟨1, ;13⟩
2		structn0fun 17159	. . 3 ⊢ (ℂfld Struct ⟨1, ;13⟩ → Fun (ℂfld ∖ {∅}))
3		fvex 6865	. . . . . . . . . . . . 13 ⊢ (Base‘ndx) ∈ V
4		cnex 11140	. . . . . . . . . . . . 13 ⊢ ℂ ∈ V
5	3, 4	opnzi 5432	. . . . . . . . . . . 12 ⊢ ⟨(Base‘ndx), ℂ⟩ ≠ ∅
6	5	nesymi 3004	. . . . . . . . . . 11 ⊢ ¬ ∅ = ⟨(Base‘ndx), ℂ⟩
7		fvex 6865	. . . . . . . . . . . . 13 ⊢ (+g‘ndx) ∈ V
8		mpoaddex 12975	. . . . . . . . . . . . 13 ⊢ (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣)) ∈ V
9	7, 8	opnzi 5432	. . . . . . . . . . . 12 ⊢ ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩ ≠ ∅
10	9	nesymi 3004	. . . . . . . . . . 11 ⊢ ¬ ∅ = ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩
11		fvex 6865	. . . . . . . . . . . . 13 ⊢ (.r‘ndx) ∈ V
12		mpomulex 12977	. . . . . . . . . . . . 13 ⊢ (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣)) ∈ V
13	11, 12	opnzi 5432	. . . . . . . . . . . 12 ⊢ ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩ ≠ ∅
14	13	nesymi 3004	. . . . . . . . . . 11 ⊢ ¬ ∅ = ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩
15		3ioran 1114	. . . . . . . . . . . 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 5247	. . . . . . . . . . . . 13 ⊢ ∅ ∈ V
17	16	eltp 4638	. . . . . . . . . . . 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 335	. . . . . . . . . . 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 1351	. . . . . . . . . 10 ⊢ ¬ ∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩}
20		fvex 6865	. . . . . . . . . . . . 13 ⊢ (*𝑟‘ndx) ∈ V
21		cjf 15103	. . . . . . . . . . . . . 14 ⊢ ∗:ℂ⟶ℂ
22		fex 7195	. . . . . . . . . . . . . 14 ⊢ ((∗:ℂ⟶ℂ ∧ ℂ ∈ V) → ∗ ∈ V)
23	21, 4, 22	mp2an 700	. . . . . . . . . . . . 13 ⊢ ∗ ∈ V
24	20, 23	opnzi 5432	. . . . . . . . . . . 12 ⊢ ⟨(*𝑟‘ndx), ∗⟩ ≠ ∅
25	24	necomi 3001	. . . . . . . . . . 11 ⊢ ∅ ≠ ⟨(*𝑟‘ndx), ∗⟩
26		nelsn 4615	. . . . . . . . . . 11 ⊢ (∅ ≠ ⟨(*𝑟‘ndx), ∗⟩ → ¬ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩})
27	25, 26	ax-mp 5	. . . . . . . . . 10 ⊢ ¬ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩}
28	19, 27	pm3.2i 473	. . . . . . . . 9 ⊢ (¬ ∅ ∈ {⟨(Base‘ndx), ℂ⟩, ⟨(+g‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 + 𝑣))⟩, ⟨(.r‘ndx), (𝑢 ∈ ℂ, 𝑣 ∈ ℂ ↦ (𝑢 · 𝑣))⟩} ∧ ¬ ∅ ∈ {⟨(*𝑟‘ndx), ∗⟩})
29		fvex 6865	. . . . . . . . . . . . . 14 ⊢ (TopSet‘ndx) ∈ V
30		fvex 6865	. . . . . . . . . . . . . 14 ⊢ (MetOpen‘(abs ∘ − )) ∈ V
31	29, 30	opnzi 5432	. . . . . . . . . . . . 13 ⊢ ⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩ ≠ ∅
32	31	nesymi 3004	. . . . . . . . . . . 12 ⊢ ¬ ∅ = ⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩
33		fvex 6865	. . . . . . . . . . . . . 14 ⊢ (le‘ndx) ∈ V
34		letsr 18597	. . . . . . . . . . . . . . 15 ⊢ ≤ ∈ TosetRel
35	34	elexi 3466	. . . . . . . . . . . . . 14 ⊢ ≤ ∈ V
36	33, 35	opnzi 5432	. . . . . . . . . . . . 13 ⊢ ⟨(le‘ndx), ≤ ⟩ ≠ ∅
37	36	nesymi 3004	. . . . . . . . . . . 12 ⊢ ¬ ∅ = ⟨(le‘ndx), ≤ ⟩
38		fvex 6865	. . . . . . . . . . . . . 14 ⊢ (dist‘ndx) ∈ V
39		absf 15337	. . . . . . . . . . . . . . . 16 ⊢ abs:ℂ⟶ℝ
40		fex 7195	. . . . . . . . . . . . . . . 16 ⊢ ((abs:ℂ⟶ℝ ∧ ℂ ∈ V) → abs ∈ V)
41	39, 4, 40	mp2an 700	. . . . . . . . . . . . . . 15 ⊢ abs ∈ V
42		subf 11418	. . . . . . . . . . . . . . . 16 ⊢ − :(ℂ × ℂ)⟶ℂ
43	4, 4	xpex 7721	. . . . . . . . . . . . . . . 16 ⊢ (ℂ × ℂ) ∈ V
44		fex 7195	. . . . . . . . . . . . . . . 16 ⊢ (( − :(ℂ × ℂ)⟶ℂ ∧ (ℂ × ℂ) ∈ V) → − ∈ V)
45	42, 43, 44	mp2an 700	. . . . . . . . . . . . . . 15 ⊢ − ∈ V
46	41, 45	coex 7896	. . . . . . . . . . . . . 14 ⊢ (abs ∘ − ) ∈ V
47	38, 46	opnzi 5432	. . . . . . . . . . . . 13 ⊢ ⟨(dist‘ndx), (abs ∘ − )⟩ ≠ ∅
48	47	nesymi 3004	. . . . . . . . . . . 12 ⊢ ¬ ∅ = ⟨(dist‘ndx), (abs ∘ − )⟩
49	32, 37, 48	3pm3.2ni 1499	. . . . . . . . . . 11 ⊢ ¬ (∅ = ⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩ ∨ ∅ = ⟨(le‘ndx), ≤ ⟩ ∨ ∅ = ⟨(dist‘ndx), (abs ∘ − )⟩)
50	16	eltp 4638	. . . . . . . . . . 11 ⊢ (∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ↔ (∅ = ⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩ ∨ ∅ = ⟨(le‘ndx), ≤ ⟩ ∨ ∅ = ⟨(dist‘ndx), (abs ∘ − )⟩))
51	49, 50	mtbir 325	. . . . . . . . . 10 ⊢ ¬ ∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩}
52		fvex 6865	. . . . . . . . . . . . 13 ⊢ (UnifSet‘ndx) ∈ V
53		fvex 6865	. . . . . . . . . . . . 13 ⊢ (metUnif‘(abs ∘ − )) ∈ V
54	52, 53	opnzi 5432	. . . . . . . . . . . 12 ⊢ ⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩ ≠ ∅
55	54	necomi 3001	. . . . . . . . . . 11 ⊢ ∅ ≠ ⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩
56		nelsn 4615	. . . . . . . . . . 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 473	. . . . . . . . 9 ⊢ (¬ ∅ ∈ {⟨(TopSet‘ndx), (MetOpen‘(abs ∘ − ))⟩, ⟨(le‘ndx), ≤ ⟩, ⟨(dist‘ndx), (abs ∘ − )⟩} ∧ ¬ ∅ ∈ {⟨(UnifSet‘ndx), (metUnif‘(abs ∘ − ))⟩})
59	28, 58	pm3.2i 473	. . . . . . . 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 994	. . . . . . . . 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 994	. . . . . . . . . 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 994	. . . . . . . . . 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 636	. . . . . . . . 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 277	. . . . . . . 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 233	. . . . . . 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 21394	. . . . . . . . 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 2844	. . . . . . . 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 4097	. . . . . . . 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 4097	. . . . . . . . 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 4097	. . . . . . . . 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 923	. . . . . . . 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 299	. . . . . . 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 325	. . . . . 6 ⊢ ¬ ∅ ∈ ℂfld
74		disjsn 4660	. . . . . 6 ⊢ ((ℂfld ∩ {∅}) = ∅ ↔ ¬ ∅ ∈ ℂfld)
75	73, 74	mpbir 233	. . . . 5 ⊢ (ℂfld ∩ {∅}) = ∅
76		disjdif2 4424	. . . . 5 ⊢ ((ℂfld ∩ {∅}) = ∅ → (ℂfld ∖ {∅}) = ℂfld)
77	75, 76	ax-mp 5	. . . 4 ⊢ (ℂfld ∖ {∅}) = ℂfld
78	77	funeqi 6527	. . 3 ⊢ (Fun (ℂfld ∖ {∅}) ↔ Fun ℂfld)
79	2, 78	sylib 220	. 2 ⊢ (ℂfld Struct ⟨1, ;13⟩ → Fun ℂfld)
80	1, 79	ax-mp 5	1 ⊢ Fun ℂfld

Syntax hints:  ¬ wn 3   ∧ wa 398   ∨ wo 856   ∨ w3o 1094   ∧ w3a 1095   = wceq 1550   ∈ wcel 2132   ≠ wne 2947  Vcvv 3444   ∖ cdif 3892   ∪ cun 3893   ∩ cin 3894  ∅c0 4276  {csn 4572  {ctp 4576  ⟨cop 4578   class class class wbr 5090   × cxp 5634   ∘ ccom 5640  Fun wfun 6500  ⟶wf 6502  ‘cfv 6506  (class class class)co 7381   ∈ cmpo 7383  ℂcc 11057  ℝcr 11058  1c1 11060   + caddc 11062   · cmul 11064   ≤ cle 11203   − cmin 11400  3c3 12259  ;cdc 12674  ∗ccj 15095  abscabs 15233   Struct cstr 17154  ndxcnx 17201  Basecbs 17217  +_gcplusg 17258  ._rcmulr 17259  *_𝑟cstv 17260  TopSetcts 17264  lecple 17265  distcds 17267  UnifSetcunif 17268   TosetRel ctsr 18569  MetOpencmopn 21383  metUnifcmetu 21384  ℂ_fldccnfld 21393

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1805  ax-4 1819  ax-5 1920  ax-6 1977  ax-7 2018  ax-8 2134  ax-9 2142  ax-10 2165  ax-11 2181  ax-12 2202  ax-ext 2724  ax-rep 5217  ax-sep 5236  ax-nul 5246  ax-pow 5312  ax-pr 5380  ax-un 7703  ax-cnex 11115  ax-resscn 11116  ax-1cn 11117  ax-icn 11118  ax-addcl 11119  ax-addrcl 11120  ax-mulcl 11121  ax-mulrcl 11122  ax-mulcom 11123  ax-addass 11124  ax-mulass 11125  ax-distr 11126  ax-i2m1 11127  ax-1ne0 11128  ax-1rid 11129  ax-rnegex 11130  ax-rrecex 11131  ax-cnre 11132  ax-pre-lttri 11133  ax-pre-lttrn 11134  ax-pre-ltadd 11135  ax-pre-mulgt0 11136  ax-pre-sup 11137

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 857  df-3or 1096  df-3an 1097  df-tru 1553  df-fal 1563  df-ex 1790  df-nf 1794  df-sb 2081  df-mo 2556  df-eu 2586  df-clab 2731  df-cleq 2744  df-clel 2827  df-nfc 2901  df-ne 2948  df-nel 3052  df-ral 3067  df-rex 3077  df-rmo 3357  df-reu 3358  df-rab 3405  df-v 3446  df-sbc 3736  df-csb 3844  df-dif 3898  df-un 3900  df-in 3902  df-ss 3912  df-pss 3915  df-nul 4277  df-if 4471  df-pw 4547  df-sn 4573  df-pr 4575  df-tp 4577  df-op 4579  df-uni 4856  df-iun 4941  df-br 5091  df-opab 5153  df-mpt 5172  df-tr 5198  df-id 5531  df-eprel 5536  df-po 5544  df-so 5545  df-fr 5589  df-we 5591  df-xp 5642  df-rel 5643  df-cnv 5644  df-co 5645  df-dm 5646  df-rn 5647  df-res 5648  df-ima 5649  df-pred 6273  df-ord 6334  df-on 6335  df-lim 6336  df-suc 6337  df-iota 6462  df-fun 6508  df-fn 6509  df-f 6510  df-f1 6511  df-fo 6512  df-f1o 6513  df-fv 6514  df-riota 7338  df-ov 7384  df-oprab 7385  df-mpo 7386  df-om 7832  df-1st 7955  df-2nd 7956  df-frecs 8246  df-wrecs 8277  df-recs 8326  df-rdg 8365  df-1o 8421  df-er 8662  df-en 8913  df-dom 8914  df-sdom 8915  df-fin 8916  df-sup 9374  df-pnf 11204  df-mnf 11205  df-xr 11206  df-ltxr 11207  df-le 11208  df-sub 11402  df-neg 11403  df-div 11831  df-nn 12197  df-2 12266  df-3 12267  df-4 12268  df-5 12269  df-6 12270  df-7 12271  df-8 12272  df-9 12273  df-n0 12468  df-z 12555  df-dec 12675  df-uz 12826  df-rp 12980  df-fz 13499  df-seq 14001  df-exp 14061  df-cj 15098  df-re 15099  df-im 15100  df-sqrt 15234  df-abs 15235  df-struct 17155  df-slot 17190  df-ndx 17202  df-base 17218  df-plusg 17271  df-mulr 17272  df-starv 17273  df-tset 17277  df-ple 17278  df-ds 17280  df-unif 17281  df-ps 18570  df-tsr 18571  df-cnfld 21394

This theorem is referenced by: (None)