Mathbox for Alexander van der Vekens < Previous   Next > Nearby theorems Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  nrhmzr Structured version   Visualization version   GIF version

Theorem nrhmzr 43976
 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 2826 . . . . . . . . . 10 (Base‘𝑍) = (Base‘𝑍)
2 eqid 2826 . . . . . . . . . 10 (0g𝑍) = (0g𝑍)
3 eqid 2826 . . . . . . . . . 10 (1r𝑍) = (1r𝑍)
41, 2, 30ring1eq0 43975 . . . . . . . . 9 (𝑍 ∈ (Ring ∖ NzRing) → (1r𝑍) = (0g𝑍))
54adantr 481 . . . . . . . 8 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → (1r𝑍) = (0g𝑍))
65adantr 481 . . . . . . 7 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → (1r𝑍) = (0g𝑍))
76eqcomd 2832 . . . . . 6 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → (0g𝑍) = (1r𝑍))
87fveq2d 6671 . . . . 5 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → (𝑓‘(0g𝑍)) = (𝑓‘(1r𝑍)))
9 eqid 2826 . . . . . . 7 (1r𝑅) = (1r𝑅)
103, 9rhm1 19402 . . . . . 6 (𝑓 ∈ (𝑍 RingHom 𝑅) → (𝑓‘(1r𝑍)) = (1r𝑅))
1110adantl 482 . . . . 5 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → (𝑓‘(1r𝑍)) = (1r𝑅))
128, 11eqtrd 2861 . . . 4 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → (𝑓‘(0g𝑍)) = (1r𝑅))
13 rhmghm 19397 . . . . . 6 (𝑓 ∈ (𝑍 RingHom 𝑅) → 𝑓 ∈ (𝑍 GrpHom 𝑅))
1413adantl 482 . . . . 5 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → 𝑓 ∈ (𝑍 GrpHom 𝑅))
15 eqid 2826 . . . . . 6 (0g𝑅) = (0g𝑅)
162, 15ghmid 18294 . . . . 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 512 . . 3 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ 𝑓 ∈ (𝑍 RingHom 𝑅)) → ((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)))
1918ralrimiva 3187 . 2 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → ∀𝑓 ∈ (𝑍 RingHom 𝑅)((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)))
209, 15nzrnz 19952 . . . . . . . . . . . . 13 (𝑅 ∈ NzRing → (1r𝑅) ≠ (0g𝑅))
2120necomd 3076 . . . . . . . . . . . 12 (𝑅 ∈ NzRing → (0g𝑅) ≠ (1r𝑅))
2221adantl 482 . . . . . . . . . . 11 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → (0g𝑅) ≠ (1r𝑅))
2322adantr 481 . . . . . . . . . 10 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)) → (0g𝑅) ≠ (1r𝑅))
24 neeq1 3083 . . . . . . . . . . 11 ((𝑓‘(0g𝑍)) = (0g𝑅) → ((𝑓‘(0g𝑍)) ≠ (1r𝑅) ↔ (0g𝑅) ≠ (1r𝑅)))
2524adantl 482 . . . . . . . . . 10 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)) → ((𝑓‘(0g𝑍)) ≠ (1r𝑅) ↔ (0g𝑅) ≠ (1r𝑅)))
2623, 25mpbird 258 . . . . . . . . 9 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)) → (𝑓‘(0g𝑍)) ≠ (1r𝑅))
2726orcd 871 . . . . . . . 8 (((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)) → ((𝑓‘(0g𝑍)) ≠ (1r𝑅) ∨ (𝑓‘(0g𝑍)) ≠ (0g𝑅)))
2827expcom 414 . . . . . . 7 ((𝑓‘(0g𝑍)) = (0g𝑅) → ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → ((𝑓‘(0g𝑍)) ≠ (1r𝑅) ∨ (𝑓‘(0g𝑍)) ≠ (0g𝑅))))
29 olc 864 . . . . . . . 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 3105 . . . . . 6 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → ((𝑓‘(0g𝑍)) ≠ (1r𝑅) ∨ (𝑓‘(0g𝑍)) ≠ (0g𝑅)))
32 neorian 3116 . . . . . 6 (((𝑓‘(0g𝑍)) ≠ (1r𝑅) ∨ (𝑓‘(0g𝑍)) ≠ (0g𝑅)) ↔ ¬ ((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)))
3331, 32sylib 219 . . . . 5 ((𝑍 ∈ (Ring ∖ NzRing) ∧ 𝑅 ∈ NzRing) → ¬ ((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)))
34 con3 156 . . . . 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 1910 . . 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 3148 . . 3 (∀𝑓 ∈ (𝑍 RingHom 𝑅)((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅)) ↔ ∀𝑓(𝑓 ∈ (𝑍 RingHom 𝑅) → ((𝑓‘(0g𝑍)) = (1r𝑅) ∧ (𝑓‘(0g𝑍)) = (0g𝑅))))
38 eq0 4312 . . 3 ((𝑍 RingHom 𝑅) = ∅ ↔ ∀𝑓 ¬ 𝑓 ∈ (𝑍 RingHom 𝑅))
3936, 37, 383imtr4g 297 . 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 207   ∧ wa 396   ∨ wo 843  ∀wal 1528   = wceq 1530   ∈ wcel 2107   ≠ wne 3021  ∀wral 3143   ∖ cdif 3937  ∅c0 4295  ‘cfv 6352  (class class class)co 7148  Basecbs 16473  0gc0g 16703   GrpHom cghm 18285  1rcur 19171  Ringcrg 19217   RingHom crh 19384  NzRingcnzr 19949 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1904  ax-6 1963  ax-7 2008  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2153  ax-12 2169  ax-ext 2798  ax-rep 5187  ax-sep 5200  ax-nul 5207  ax-pow 5263  ax-pr 5326  ax-un 7451  ax-cnex 10582  ax-resscn 10583  ax-1cn 10584  ax-icn 10585  ax-addcl 10586  ax-addrcl 10587  ax-mulcl 10588  ax-mulrcl 10589  ax-mulcom 10590  ax-addass 10591  ax-mulass 10592  ax-distr 10593  ax-i2m1 10594  ax-1ne0 10595  ax-1rid 10596  ax-rnegex 10597  ax-rrecex 10598  ax-cnre 10599  ax-pre-lttri 10600  ax-pre-lttrn 10601  ax-pre-ltadd 10602  ax-pre-mulgt0 10603 This theorem depends on definitions:  df-bi 208  df-an 397  df-or 844  df-3or 1082  df-3an 1083  df-tru 1533  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2620  df-eu 2652  df-clab 2805  df-cleq 2819  df-clel 2898  df-nfc 2968  df-ne 3022  df-nel 3129  df-ral 3148  df-rex 3149  df-reu 3150  df-rmo 3151  df-rab 3152  df-v 3502  df-sbc 3777  df-csb 3888  df-dif 3943  df-un 3945  df-in 3947  df-ss 3956  df-pss 3958  df-nul 4296  df-if 4471  df-pw 4544  df-sn 4565  df-pr 4567  df-tp 4569  df-op 4571  df-uni 4838  df-int 4875  df-iun 4919  df-br 5064  df-opab 5126  df-mpt 5144  df-tr 5170  df-id 5459  df-eprel 5464  df-po 5473  df-so 5474  df-fr 5513  df-we 5515  df-xp 5560  df-rel 5561  df-cnv 5562  df-co 5563  df-dm 5564  df-rn 5565  df-res 5566  df-ima 5567  df-pred 6146  df-ord 6192  df-on 6193  df-lim 6194  df-suc 6195  df-iota 6312  df-fun 6354  df-fn 6355  df-f 6356  df-f1 6357  df-fo 6358  df-f1o 6359  df-fv 6360  df-riota 7106  df-ov 7151  df-oprab 7152  df-mpo 7153  df-om 7569  df-1st 7680  df-2nd 7681  df-wrecs 7938  df-recs 7999  df-rdg 8037  df-1o 8093  df-oadd 8097  df-er 8279  df-map 8398  df-en 8499  df-dom 8500  df-sdom 8501  df-fin 8502  df-dju 9319  df-card 9357  df-pnf 10666  df-mnf 10667  df-xr 10668  df-ltxr 10669  df-le 10670  df-sub 10861  df-neg 10862  df-nn 11628  df-2 11689  df-n0 11887  df-xnn0 11957  df-z 11971  df-uz 12233  df-fz 12883  df-hash 13681  df-ndx 16476  df-slot 16477  df-base 16479  df-sets 16480  df-plusg 16568  df-0g 16705  df-mgm 17842  df-sgrp 17890  df-mnd 17901  df-mhm 17944  df-grp 18036  df-minusg 18037  df-ghm 18286  df-mgp 19160  df-ur 19172  df-ring 19219  df-rnghom 19387  df-nzr 19950 This theorem is referenced by:  zrninitoringc  44174  nzerooringczr  44175
 Copyright terms: Public domain W3C validator