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Theorem nrhmzr 42198
Description: There is no ring homomorphism from the zero ring into a nonzero ring. (Contributed by AV, 18-Apr-2020.)
Assertion
Ref Expression
nrhmzr ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → (𝑍 RingHom 𝑅) = ∅)

Proof of Theorem nrhmzr
Dummy variable 𝑓 is distinct from all other variables.
StepHypRef Expression
1 eqid 2651 . . . . . . . . . 10 (Base‘𝑍) = (Base‘𝑍)
2 eqid 2651 . . . . . . . . . 10 (0g𝑍) = (0g𝑍)
3 eqid 2651 . . . . . . . . . 10 (1r𝑍) = (1r𝑍)
41, 2, 30ring1eq0 42197 . . . . . . . . 9 (𝑍 ∈ (Ring ∖ NzRing) → (1r𝑍) = (0g𝑍))
54adantr 480 . . . . . . . 8 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → (1r𝑍) = (0g𝑍))
65adantr 480 . . . . . . 7 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → (1r𝑍) = (0g𝑍))
76eqcomd 2657 . . . . . 6 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → (0g𝑍) = (1r𝑍))
87fveq2d 6233 . . . . 5 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → (𝑓‘(0g𝑍)) = (𝑓‘(1r𝑍)))
9 eqid 2651 . . . . . . 7 (1r𝑅) = (1r𝑅)
103, 9rhm1 18778 . . . . . 6 (𝑓 ∈ (𝑍 RingHom 𝑅) → (𝑓‘(1r𝑍)) = (1r𝑅))
1110adantl 481 . . . . 5 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → (𝑓‘(1r𝑍)) = (1r𝑅))
128, 11eqtrd 2685 . . . 4 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → (𝑓‘(0g𝑍)) = (1r𝑅))
13 rhmghm 18773 . . . . . 6 (𝑓 ∈ (𝑍 RingHom 𝑅) → 𝑓 ∈ (𝑍 GrpHom 𝑅))
1413adantl 481 . . . . 5 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → 𝑓 ∈ (𝑍 GrpHom 𝑅))
15 eqid 2651 . . . . . 6 (0g𝑅) = (0g𝑅)
162, 15ghmid 17713 . . . . 5 (𝑓 ∈ (𝑍 GrpHom 𝑅) → (𝑓‘(0g𝑍)) = (0g𝑅))
1714, 16syl 17 . . . 4 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → (𝑓‘(0g𝑍)) = (0g𝑅))
1812, 17jca 553 . . 3 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → ((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)))
1918ralrimiva 2995 . 2 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → ∀𝑓 ∈ (𝑍 RingHom 𝑅)((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)))
209, 15nzrnz 19308 . . . . . . . . . . . . 13 (𝑅 ∈ NzRing → (1r𝑅) ≠ (0g𝑅))
2120necomd 2878 . . . . . . . . . . . 12 (𝑅 ∈ NzRing → (0g𝑅) ≠ (1r𝑅))
2221adantl 481 . . . . . . . . . . 11 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → (0g𝑅) ≠ (1r𝑅))
2322adantr 480 . . . . . . . . . 10 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)) → (0g𝑅) ≠ (1r𝑅))
24 neeq1 2885 . . . . . . . . . . 11 ((𝑓‘(0g𝑍)) = (0g𝑅) → ((𝑓‘(0g𝑍)) ≠ (1r𝑅) ↔ (0g𝑅) ≠ (1r𝑅)))
2524adantl 481 . . . . . . . . . 10 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)) → ((𝑓‘(0g𝑍)) ≠ (1r𝑅) ↔ (0g𝑅) ≠ (1r𝑅)))
2623, 25mpbird 247 . . . . . . . . 9 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)) → (𝑓‘(0g𝑍)) ≠ (1r𝑅))
2726orcd 406 . . . . . . . 8 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)) → ((𝑓‘(0g𝑍)) ≠ (1r𝑅) ∨ (𝑓‘(0g𝑍)) ≠ (0g𝑅)))
2827expcom 450 . . . . . . 7 ((𝑓‘(0g𝑍)) = (0g𝑅) → ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → ((𝑓‘(0g𝑍)) ≠ (1r𝑅) ∨ (𝑓‘(0g𝑍)) ≠ (0g𝑅))))
29 olc 398 . . . . . . . 8 ((𝑓‘(0g𝑍)) ≠ (0g𝑅) → ((𝑓‘(0g𝑍)) ≠ (1r𝑅) ∨ (𝑓‘(0g𝑍)) ≠ (0g𝑅)))
3029a1d 25 . . . . . . 7 ((𝑓‘(0g𝑍)) ≠ (0g𝑅) → ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → ((𝑓‘(0g𝑍)) ≠ (1r𝑅) ∨ (𝑓‘(0g𝑍)) ≠ (0g𝑅))))
3128, 30pm2.61ine 2906 . . . . . 6 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → ((𝑓‘(0g𝑍)) ≠ (1r𝑅) ∨ (𝑓‘(0g𝑍)) ≠ (0g𝑅)))
32 neorian 2917 . . . . . 6 (((𝑓‘(0g𝑍)) ≠ (1r𝑅) ∨ (𝑓‘(0g𝑍)) ≠ (0g𝑅)) ↔ ¬ ((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)))
3331, 32sylib 208 . . . . 5 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → ¬ ((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)))
34 con3 149 . . . . 5 ((𝑓 ∈ (𝑍 RingHom 𝑅) → ((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅))) → (¬ ((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)) → ¬ 𝑓 ∈ (𝑍 RingHom 𝑅)))
3533, 34syl5com 31 . . . 4 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → ((𝑓 ∈ (𝑍 RingHom 𝑅) → ((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅))) → ¬ 𝑓 ∈ (𝑍 RingHom 𝑅)))
3635alimdv 1885 . . 3 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → (∀𝑓(𝑓 ∈ (𝑍 RingHom 𝑅) → ((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅))) → ∀𝑓 ¬ 𝑓 ∈ (𝑍 RingHom 𝑅)))
37 df-ral 2946 . . 3 (∀𝑓 ∈ (𝑍 RingHom 𝑅)((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)) ↔ ∀𝑓(𝑓 ∈ (𝑍 RingHom 𝑅) → ((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅))))
38 eq0 3962 . . 3 ((𝑍 RingHom 𝑅) = ∅ ↔ ∀𝑓 ¬ 𝑓 ∈ (𝑍 RingHom 𝑅))
3936, 37, 383imtr4g 285 . 2 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → (∀𝑓 ∈ (𝑍 RingHom 𝑅)((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)) → (𝑍 RingHom 𝑅) = ∅))
4019, 39mpd 15 1 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → (𝑍 RingHom 𝑅) = ∅)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wo 382  wa 383  wal 1521   = wceq 1523  wcel 2030  wne 2823  wral 2941  cdif 3604  c0 3948  cfv 5926  (class class class)co 6690  Basecbs 15904  0gc0g 16147   GrpHom cghm 17704  1rcur 18547  Ringcrg 18593   RingHom crh 18760  NzRingcnzr 19305
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991  ax-cnex 10030  ax-resscn 10031  ax-1cn 10032  ax-icn 10033  ax-addcl 10034  ax-addrcl 10035  ax-mulcl 10036  ax-mulrcl 10037  ax-mulcom 10038  ax-addass 10039  ax-mulass 10040  ax-distr 10041  ax-i2m1 10042  ax-1ne0 10043  ax-1rid 10044  ax-rnegex 10045  ax-rrecex 10046  ax-cnre 10047  ax-pre-lttri 10048  ax-pre-lttrn 10049  ax-pre-ltadd 10050  ax-pre-mulgt0 10051
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-int 4508  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-riota 6651  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-om 7108  df-1st 7210  df-2nd 7211  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-1o 7605  df-oadd 7609  df-er 7787  df-map 7901  df-en 7998  df-dom 7999  df-sdom 8000  df-fin 8001  df-card 8803  df-cda 9028  df-pnf 10114  df-mnf 10115  df-xr 10116  df-ltxr 10117  df-le 10118  df-sub 10306  df-neg 10307  df-nn 11059  df-2 11117  df-n0 11331  df-xnn0 11402  df-z 11416  df-uz 11726  df-fz 12365  df-hash 13158  df-ndx 15907  df-slot 15908  df-base 15910  df-sets 15911  df-plusg 16001  df-0g 16149  df-mgm 17289  df-sgrp 17331  df-mnd 17342  df-mhm 17382  df-grp 17472  df-minusg 17473  df-ghm 17705  df-mgp 18536  df-ur 18548  df-ring 18595  df-rnghom 18763  df-nzr 19306
This theorem is referenced by:  zrninitoringc  42396  nzerooringczr  42397
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