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Theorem 01eq0ring 14334
Description: If the zero and the identity element of a ring are the same, the ring is the zero ring. (Contributed by AV, 16-Apr-2019.) (Proof shortened by SN, 23-Feb-2025.)
Hypotheses
Ref Expression
0ring.b  |-  B  =  ( Base `  R
)
0ring.0  |-  .0.  =  ( 0g `  R )
0ring01eq.1  |-  .1.  =  ( 1r `  R )
Assertion
Ref Expression
01eq0ring  |-  ( ( R  e.  Ring  /\  .0.  =  .1.  )  ->  B  =  {  .0.  } )

Proof of Theorem 01eq0ring
Dummy variable  x is distinct from all other variables.
StepHypRef Expression
1 eqcom 2234 . 2  |-  (  .0.  =  .1.  <->  .1.  =  .0.  )
2 0ring.b . . . . 5  |-  B  =  ( Base `  R
)
3 0ring.0 . . . . 5  |-  .0.  =  ( 0g `  R )
42, 3ring0cl 14165 . . . 4  |-  ( R  e.  Ring  ->  .0.  e.  B )
5 elex2 2830 . . . 4  |-  (  .0. 
e.  B  ->  E. x  x  e.  B )
64, 5syl 14 . . 3  |-  ( R  e.  Ring  ->  E. x  x  e.  B )
74adantr 276 . . . . . 6  |-  ( ( R  e.  Ring  /\  x  e.  B )  ->  .0.  e.  B )
8 0ring01eq.1 . . . . . . 7  |-  .1.  =  ( 1r `  R )
92, 8, 3ring1eq0 14192 . . . . . 6  |-  ( ( R  e.  Ring  /\  x  e.  B  /\  .0.  e.  B )  ->  (  .1.  =  .0.  ->  x  =  .0.  ) )
107, 9mpd3an3 1375 . . . . 5  |-  ( ( R  e.  Ring  /\  x  e.  B )  ->  (  .1.  =  .0.  ->  x  =  .0.  ) )
1110impancom 260 . . . 4  |-  ( ( R  e.  Ring  /\  .1.  =  .0.  )  ->  (
x  e.  B  ->  x  =  .0.  )
)
1211ralrimiv 2614 . . 3  |-  ( ( R  e.  Ring  /\  .1.  =  .0.  )  ->  A. x  e.  B  x  =  .0.  )
13 eqsnm 3859 . . . 4  |-  ( E. x  x  e.  B  ->  ( B  =  {  .0.  }  <->  A. x  e.  B  x  =  .0.  )
)
1413biimpar 297 . . 3  |-  ( ( E. x  x  e.  B  /\  A. x  e.  B  x  =  .0.  )  ->  B  =  {  .0.  } )
156, 12, 14syl2an2r 599 . 2  |-  ( ( R  e.  Ring  /\  .1.  =  .0.  )  ->  B  =  {  .0.  } )
161, 15sylan2b 287 1  |-  ( ( R  e.  Ring  /\  .0.  =  .1.  )  ->  B  =  {  .0.  } )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1398   E.wex 1541    e. wcel 2203   A.wral 2520   {csn 3689   ` cfv 5352   Basecbs 13212   0gc0g 13469   1rcur 14103   Ringcrg 14140
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-coll 4225  ax-sep 4228  ax-pow 4287  ax-pr 4322  ax-un 4554  ax-setind 4659  ax-cnex 8218  ax-resscn 8219  ax-1cn 8220  ax-1re 8221  ax-icn 8222  ax-addcl 8223  ax-addrcl 8224  ax-mulcl 8225  ax-addcom 8227  ax-addass 8229  ax-i2m1 8232  ax-0lt1 8233  ax-0id 8235  ax-rnegex 8236  ax-pre-ltirr 8239  ax-pre-ltadd 8243
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-reu 2527  df-rmo 2528  df-rab 2529  df-v 2815  df-sbc 3043  df-csb 3139  df-dif 3213  df-un 3215  df-in 3217  df-ss 3224  df-nul 3509  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-int 3950  df-iun 3993  df-br 4110  df-opab 4172  df-mpt 4173  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-ima 4762  df-iota 5312  df-fun 5354  df-fn 5355  df-f 5356  df-f1 5357  df-fo 5358  df-f1o 5359  df-fv 5360  df-riota 6003  df-ov 6053  df-oprab 6054  df-mpo 6055  df-pnf 8310  df-mnf 8311  df-ltxr 8313  df-inn 9238  df-2 9296  df-3 9297  df-ndx 13215  df-slot 13216  df-base 13218  df-sets 13219  df-plusg 13303  df-mulr 13304  df-0g 13471  df-mgm 13569  df-sgrp 13615  df-mnd 13630  df-grp 13716  df-minusg 13717  df-mgp 14065  df-ur 14104  df-ring 14142
This theorem is referenced by: (None)
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