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Theorem nzerooringczr 41333
Description: There is no zero object in the category of unital rings (at least in a universe which contains the zero ring and the ring of integers). Example 7.9 (3) in [Adamek] p. 103. (Contributed by AV, 18-Apr-2020.)
Hypotheses
Ref Expression
nzerooringczr.u (𝜑𝑈𝑉)
nzerooringczr.c 𝐶 = (RingCat‘𝑈)
nzerooringczr.z (𝜑𝑍 ∈ (Ring ∖ NzRing))
nzerooringczr.e (𝜑𝑍𝑈)
nzerooringczr.i (𝜑 → ℤring𝑈)
Assertion
Ref Expression
nzerooringczr (𝜑 → (ZeroO‘𝐶) = ∅)

Proof of Theorem nzerooringczr
Dummy variables 𝑓 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ax-1 6 . 2 ((ZeroO‘𝐶) = ∅ → (𝜑 → (ZeroO‘𝐶) = ∅))
2 neq0 3911 . . 3 (¬ (ZeroO‘𝐶) = ∅ ↔ ∃ ∈ (ZeroO‘𝐶))
3 nzerooringczr.u . . . . . . . 8 (𝜑𝑈𝑉)
4 nzerooringczr.c . . . . . . . . 9 𝐶 = (RingCat‘𝑈)
54ringccat 41285 . . . . . . . 8 (𝑈𝑉𝐶 ∈ Cat)
63, 5syl 17 . . . . . . 7 (𝜑𝐶 ∈ Cat)
7 iszeroi 16575 . . . . . . 7 ((𝐶 ∈ Cat ∧ ∈ (ZeroO‘𝐶)) → ( ∈ (Base‘𝐶) ∧ ( ∈ (InitO‘𝐶) ∧ ∈ (TermO‘𝐶))))
86, 7sylan 488 . . . . . 6 ((𝜑 ∈ (ZeroO‘𝐶)) → ( ∈ (Base‘𝐶) ∧ ( ∈ (InitO‘𝐶) ∧ ∈ (TermO‘𝐶))))
9 nzerooringczr.z . . . . . . . . 9 (𝜑𝑍 ∈ (Ring ∖ NzRing))
10 nzerooringczr.e . . . . . . . . 9 (𝜑𝑍𝑈)
113, 4, 9, 10zrtermoringc 41331 . . . . . . . 8 (𝜑𝑍 ∈ (TermO‘𝐶))
12 nzerooringczr.i . . . . . . . . . 10 (𝜑 → ℤring𝑈)
133, 12, 4irinitoringc 41330 . . . . . . . . 9 (𝜑 → ℤring ∈ (InitO‘𝐶))
146ad2antrr 761 . . . . . . . . . . . . . . . . 17 (((𝜑 ∈ (InitO‘𝐶)) ∧ ℤring ∈ (InitO‘𝐶)) → 𝐶 ∈ Cat)
15 simplr 791 . . . . . . . . . . . . . . . . 17 (((𝜑 ∈ (InitO‘𝐶)) ∧ ℤring ∈ (InitO‘𝐶)) → ∈ (InitO‘𝐶))
16 simpr 477 . . . . . . . . . . . . . . . . 17 (((𝜑 ∈ (InitO‘𝐶)) ∧ ℤring ∈ (InitO‘𝐶)) → ℤring ∈ (InitO‘𝐶))
1714, 15, 16initoeu1w 16578 . . . . . . . . . . . . . . . 16 (((𝜑 ∈ (InitO‘𝐶)) ∧ ℤring ∈ (InitO‘𝐶)) → ( ≃𝑐𝐶)ℤring)
186ad2antrr 761 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑 ∈ (TermO‘𝐶)) ∧ 𝑍 ∈ (TermO‘𝐶)) → 𝐶 ∈ Cat)
19 simpr 477 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑 ∈ (TermO‘𝐶)) ∧ 𝑍 ∈ (TermO‘𝐶)) → 𝑍 ∈ (TermO‘𝐶))
20 simplr 791 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑 ∈ (TermO‘𝐶)) ∧ 𝑍 ∈ (TermO‘𝐶)) → ∈ (TermO‘𝐶))
2118, 19, 20termoeu1w 16585 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑 ∈ (TermO‘𝐶)) ∧ 𝑍 ∈ (TermO‘𝐶)) → 𝑍( ≃𝑐𝐶))
22 cictr 16381 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝐶 ∈ Cat ∧ 𝑍( ≃𝑐𝐶)( ≃𝑐𝐶)ℤring) → 𝑍( ≃𝑐𝐶)ℤring)
236, 22syl3an1 1356 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑𝑍( ≃𝑐𝐶)( ≃𝑐𝐶)ℤring) → 𝑍( ≃𝑐𝐶)ℤring)
24 eqid 2626 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (Iso‘𝐶) = (Iso‘𝐶)
25 eqid 2626 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (Base‘𝐶) = (Base‘𝐶)
269eldifad 3572 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (𝜑𝑍 ∈ Ring)
2710, 26elind 3781 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝜑𝑍 ∈ (𝑈 ∩ Ring))
284, 25, 3ringcbas 41272 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝜑 → (Base‘𝐶) = (𝑈 ∩ Ring))
2927, 28eleqtrrd 2707 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝜑𝑍 ∈ (Base‘𝐶))
30 zringring 19735 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ring ∈ Ring
3130a1i 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (𝜑 → ℤring ∈ Ring)
3212, 31elind 3781 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝜑 → ℤring ∈ (𝑈 ∩ Ring))
3332, 28eleqtrrd 2707 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝜑 → ℤring ∈ (Base‘𝐶))
3424, 25, 6, 29, 33cic 16375 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝜑 → (𝑍( ≃𝑐𝐶)ℤring ↔ ∃𝑓 𝑓 ∈ (𝑍(Iso‘𝐶)ℤring)))
35 n0 3912 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ((𝑍(Iso‘𝐶)ℤring) ≠ ∅ ↔ ∃𝑓 𝑓 ∈ (𝑍(Iso‘𝐶)ℤring))
36 eqid 2626 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (Hom ‘𝐶) = (Hom ‘𝐶)
3725, 36, 24, 6, 29, 33isohom 16352 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝜑 → (𝑍(Iso‘𝐶)ℤring) ⊆ (𝑍(Hom ‘𝐶)ℤring))
38 ssn0 3953 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 (((𝑍(Iso‘𝐶)ℤring) ⊆ (𝑍(Hom ‘𝐶)ℤring) ∧ (𝑍(Iso‘𝐶)ℤring) ≠ ∅) → (𝑍(Hom ‘𝐶)ℤring) ≠ ∅)
394, 25, 3, 36, 29, 33ringchom 41274 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 (𝜑 → (𝑍(Hom ‘𝐶)ℤring) = (𝑍 RingHom ℤring))
4039neeq1d 2855 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 (𝜑 → ((𝑍(Hom ‘𝐶)ℤring) ≠ ∅ ↔ (𝑍 RingHom ℤring) ≠ ∅))
41 zringnzr 19744 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ring ∈ NzRing
42 nrhmzr 41134 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ((𝑍 ∈ (Ring ∖ NzRing) ∧ ℤring ∈ NzRing) → (𝑍 RingHom ℤring) = ∅)
439, 41, 42sylancl 693 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 (𝜑 → (𝑍 RingHom ℤring) = ∅)
44 eqneqall 2807 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ((𝑍 RingHom ℤring) = ∅ → ((𝑍 RingHom ℤring) ≠ ∅ → (ZeroO‘𝐶) = ∅))
4543, 44syl 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 (𝜑 → ((𝑍 RingHom ℤring) ≠ ∅ → (ZeroO‘𝐶) = ∅))
4640, 45sylbid 230 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 (𝜑 → ((𝑍(Hom ‘𝐶)ℤring) ≠ ∅ → (ZeroO‘𝐶) = ∅))
4738, 46syl5com 31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 (((𝑍(Iso‘𝐶)ℤring) ⊆ (𝑍(Hom ‘𝐶)ℤring) ∧ (𝑍(Iso‘𝐶)ℤring) ≠ ∅) → (𝜑 → (ZeroO‘𝐶) = ∅))
4847expcom 451 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ((𝑍(Iso‘𝐶)ℤring) ≠ ∅ → ((𝑍(Iso‘𝐶)ℤring) ⊆ (𝑍(Hom ‘𝐶)ℤring) → (𝜑 → (ZeroO‘𝐶) = ∅)))
4948com13 88 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝜑 → ((𝑍(Iso‘𝐶)ℤring) ⊆ (𝑍(Hom ‘𝐶)ℤring) → ((𝑍(Iso‘𝐶)ℤring) ≠ ∅ → (ZeroO‘𝐶) = ∅)))
5037, 49mpd 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝜑 → ((𝑍(Iso‘𝐶)ℤring) ≠ ∅ → (ZeroO‘𝐶) = ∅))
5135, 50syl5bir 233 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝜑 → (∃𝑓 𝑓 ∈ (𝑍(Iso‘𝐶)ℤring) → (ZeroO‘𝐶) = ∅))
5234, 51sylbid 230 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝜑 → (𝑍( ≃𝑐𝐶)ℤring → (ZeroO‘𝐶) = ∅))
53523ad2ant1 1080 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑𝑍( ≃𝑐𝐶)( ≃𝑐𝐶)ℤring) → (𝑍( ≃𝑐𝐶)ℤring → (ZeroO‘𝐶) = ∅))
5423, 53mpd 15 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑𝑍( ≃𝑐𝐶)( ≃𝑐𝐶)ℤring) → (ZeroO‘𝐶) = ∅)
55543exp 1261 . . . . . . . . . . . . . . . . . . . . . . 23 (𝜑 → (𝑍( ≃𝑐𝐶) → (( ≃𝑐𝐶)ℤring → (ZeroO‘𝐶) = ∅)))
5655a1dd 50 . . . . . . . . . . . . . . . . . . . . . 22 (𝜑 → (𝑍( ≃𝑐𝐶) → ( ∈ (Base‘𝐶) → (( ≃𝑐𝐶)ℤring → (ZeroO‘𝐶) = ∅))))
5756ad2antrr 761 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑 ∈ (TermO‘𝐶)) ∧ 𝑍 ∈ (TermO‘𝐶)) → (𝑍( ≃𝑐𝐶) → ( ∈ (Base‘𝐶) → (( ≃𝑐𝐶)ℤring → (ZeroO‘𝐶) = ∅))))
5821, 57mpd 15 . . . . . . . . . . . . . . . . . . . 20 (((𝜑 ∈ (TermO‘𝐶)) ∧ 𝑍 ∈ (TermO‘𝐶)) → ( ∈ (Base‘𝐶) → (( ≃𝑐𝐶)ℤring → (ZeroO‘𝐶) = ∅)))
5958exp31 629 . . . . . . . . . . . . . . . . . . 19 (𝜑 → ( ∈ (TermO‘𝐶) → (𝑍 ∈ (TermO‘𝐶) → ( ∈ (Base‘𝐶) → (( ≃𝑐𝐶)ℤring → (ZeroO‘𝐶) = ∅)))))
6059com34 91 . . . . . . . . . . . . . . . . . 18 (𝜑 → ( ∈ (TermO‘𝐶) → ( ∈ (Base‘𝐶) → (𝑍 ∈ (TermO‘𝐶) → (( ≃𝑐𝐶)ℤring → (ZeroO‘𝐶) = ∅)))))
6160com25 99 . . . . . . . . . . . . . . . . 17 (𝜑 → (( ≃𝑐𝐶)ℤring → ( ∈ (Base‘𝐶) → (𝑍 ∈ (TermO‘𝐶) → ( ∈ (TermO‘𝐶) → (ZeroO‘𝐶) = ∅)))))
6261ad2antrr 761 . . . . . . . . . . . . . . . 16 (((𝜑 ∈ (InitO‘𝐶)) ∧ ℤring ∈ (InitO‘𝐶)) → (( ≃𝑐𝐶)ℤring → ( ∈ (Base‘𝐶) → (𝑍 ∈ (TermO‘𝐶) → ( ∈ (TermO‘𝐶) → (ZeroO‘𝐶) = ∅)))))
6317, 62mpd 15 . . . . . . . . . . . . . . 15 (((𝜑 ∈ (InitO‘𝐶)) ∧ ℤring ∈ (InitO‘𝐶)) → ( ∈ (Base‘𝐶) → (𝑍 ∈ (TermO‘𝐶) → ( ∈ (TermO‘𝐶) → (ZeroO‘𝐶) = ∅))))
6463ex 450 . . . . . . . . . . . . . 14 ((𝜑 ∈ (InitO‘𝐶)) → (ℤring ∈ (InitO‘𝐶) → ( ∈ (Base‘𝐶) → (𝑍 ∈ (TermO‘𝐶) → ( ∈ (TermO‘𝐶) → (ZeroO‘𝐶) = ∅)))))
6564com25 99 . . . . . . . . . . . . 13 ((𝜑 ∈ (InitO‘𝐶)) → ( ∈ (TermO‘𝐶) → ( ∈ (Base‘𝐶) → (𝑍 ∈ (TermO‘𝐶) → (ℤring ∈ (InitO‘𝐶) → (ZeroO‘𝐶) = ∅)))))
6665expimpd 628 . . . . . . . . . . . 12 (𝜑 → (( ∈ (InitO‘𝐶) ∧ ∈ (TermO‘𝐶)) → ( ∈ (Base‘𝐶) → (𝑍 ∈ (TermO‘𝐶) → (ℤring ∈ (InitO‘𝐶) → (ZeroO‘𝐶) = ∅)))))
6766com23 86 . . . . . . . . . . 11 (𝜑 → ( ∈ (Base‘𝐶) → (( ∈ (InitO‘𝐶) ∧ ∈ (TermO‘𝐶)) → (𝑍 ∈ (TermO‘𝐶) → (ℤring ∈ (InitO‘𝐶) → (ZeroO‘𝐶) = ∅)))))
6867impd 447 . . . . . . . . . 10 (𝜑 → (( ∈ (Base‘𝐶) ∧ ( ∈ (InitO‘𝐶) ∧ ∈ (TermO‘𝐶))) → (𝑍 ∈ (TermO‘𝐶) → (ℤring ∈ (InitO‘𝐶) → (ZeroO‘𝐶) = ∅))))
6968com24 95 . . . . . . . . 9 (𝜑 → (ℤring ∈ (InitO‘𝐶) → (𝑍 ∈ (TermO‘𝐶) → (( ∈ (Base‘𝐶) ∧ ( ∈ (InitO‘𝐶) ∧ ∈ (TermO‘𝐶))) → (ZeroO‘𝐶) = ∅))))
7013, 69mpd 15 . . . . . . . 8 (𝜑 → (𝑍 ∈ (TermO‘𝐶) → (( ∈ (Base‘𝐶) ∧ ( ∈ (InitO‘𝐶) ∧ ∈ (TermO‘𝐶))) → (ZeroO‘𝐶) = ∅)))
7111, 70mpd 15 . . . . . . 7 (𝜑 → (( ∈ (Base‘𝐶) ∧ ( ∈ (InitO‘𝐶) ∧ ∈ (TermO‘𝐶))) → (ZeroO‘𝐶) = ∅))
7271adantr 481 . . . . . 6 ((𝜑 ∈ (ZeroO‘𝐶)) → (( ∈ (Base‘𝐶) ∧ ( ∈ (InitO‘𝐶) ∧ ∈ (TermO‘𝐶))) → (ZeroO‘𝐶) = ∅))
738, 72mpd 15 . . . . 5 ((𝜑 ∈ (ZeroO‘𝐶)) → (ZeroO‘𝐶) = ∅)
7473expcom 451 . . . 4 ( ∈ (ZeroO‘𝐶) → (𝜑 → (ZeroO‘𝐶) = ∅))
7574exlimiv 1860 . . 3 (∃ ∈ (ZeroO‘𝐶) → (𝜑 → (ZeroO‘𝐶) = ∅))
762, 75sylbi 207 . 2 (¬ (ZeroO‘𝐶) = ∅ → (𝜑 → (ZeroO‘𝐶) = ∅))
771, 76pm2.61i 176 1 (𝜑 → (ZeroO‘𝐶) = ∅)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 384  w3a 1036   = wceq 1480  wex 1701  wcel 1992  wne 2796  cdif 3557  cin 3559  wss 3560  c0 3896   class class class wbr 4618  cfv 5850  (class class class)co 6605  Basecbs 15776  Hom chom 15868  Catccat 16241  Isociso 16322  𝑐 ccic 16371  InitOcinito 16554  TermOctermo 16555  ZeroOczeroo 16556  Ringcrg 18463   RingHom crh 18628  NzRingcnzr 19171  ringzring 19732  RingCatcringc 41264
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1841  ax-6 1890  ax-7 1937  ax-8 1994  ax-9 2001  ax-10 2021  ax-11 2036  ax-12 2049  ax-13 2250  ax-ext 2606  ax-rep 4736  ax-sep 4746  ax-nul 4754  ax-pow 4808  ax-pr 4872  ax-un 6903  ax-inf2 8483  ax-cnex 9937  ax-resscn 9938  ax-1cn 9939  ax-icn 9940  ax-addcl 9941  ax-addrcl 9942  ax-mulcl 9943  ax-mulrcl 9944  ax-mulcom 9945  ax-addass 9946  ax-mulass 9947  ax-distr 9948  ax-i2m1 9949  ax-1ne0 9950  ax-1rid 9951  ax-rnegex 9952  ax-rrecex 9953  ax-cnre 9954  ax-pre-lttri 9955  ax-pre-lttrn 9956  ax-pre-ltadd 9957  ax-pre-mulgt0 9958  ax-addf 9960  ax-mulf 9961
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-fal 1486  df-ex 1702  df-nf 1707  df-sb 1883  df-eu 2478  df-mo 2479  df-clab 2613  df-cleq 2619  df-clel 2622  df-nfc 2756  df-ne 2797  df-nel 2900  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3193  df-sbc 3423  df-csb 3520  df-dif 3563  df-un 3565  df-in 3567  df-ss 3574  df-pss 3576  df-nul 3897  df-if 4064  df-pw 4137  df-sn 4154  df-pr 4156  df-tp 4158  df-op 4160  df-uni 4408  df-int 4446  df-iun 4492  df-br 4619  df-opab 4679  df-mpt 4680  df-tr 4718  df-eprel 4990  df-id 4994  df-po 5000  df-so 5001  df-fr 5038  df-we 5040  df-xp 5085  df-rel 5086  df-cnv 5087  df-co 5088  df-dm 5089  df-rn 5090  df-res 5091  df-ima 5092  df-pred 5642  df-ord 5688  df-on 5689  df-lim 5690  df-suc 5691  df-iota 5813  df-fun 5852  df-fn 5853  df-f 5854  df-f1 5855  df-fo 5856  df-f1o 5857  df-fv 5858  df-riota 6566  df-ov 6608  df-oprab 6609  df-mpt2 6610  df-om 7014  df-1st 7116  df-2nd 7117  df-supp 7242  df-wrecs 7353  df-recs 7414  df-rdg 7452  df-1o 7506  df-oadd 7510  df-er 7688  df-map 7805  df-pm 7806  df-ixp 7854  df-en 7901  df-dom 7902  df-sdom 7903  df-fin 7904  df-card 8710  df-cda 8935  df-pnf 10021  df-mnf 10022  df-xr 10023  df-ltxr 10024  df-le 10025  df-sub 10213  df-neg 10214  df-nn 10966  df-2 11024  df-3 11025  df-4 11026  df-5 11027  df-6 11028  df-7 11029  df-8 11030  df-9 11031  df-n0 11238  df-xnn0 11309  df-z 11323  df-dec 11438  df-uz 11632  df-fz 12266  df-seq 12739  df-hash 13055  df-struct 15778  df-ndx 15779  df-slot 15780  df-base 15781  df-sets 15782  df-ress 15783  df-plusg 15870  df-mulr 15871  df-starv 15872  df-tset 15876  df-ple 15877  df-ds 15880  df-unif 15881  df-hom 15882  df-cco 15883  df-0g 16018  df-cat 16245  df-cid 16246  df-homf 16247  df-sect 16323  df-inv 16324  df-iso 16325  df-cic 16372  df-ssc 16386  df-resc 16387  df-subc 16388  df-inito 16557  df-termo 16558  df-zeroo 16559  df-estrc 16679  df-mgm 17158  df-sgrp 17200  df-mnd 17211  df-mhm 17251  df-grp 17341  df-minusg 17342  df-mulg 17457  df-subg 17507  df-ghm 17574  df-cmn 18111  df-mgp 18406  df-ur 18418  df-ring 18465  df-cring 18466  df-rnghom 18631  df-subrg 18694  df-nzr 19172  df-cnfld 19661  df-zring 19733  df-ringc 41266
This theorem is referenced by: (None)
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