ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  f1ghm0to0 GIF version

Theorem f1ghm0to0 13402
Description: If a group homomorphism 𝐹 is injective, it maps the zero of one group (and only the zero) to the zero of the other group. (Contributed by AV, 24-Oct-2019.) (Revised by Thierry Arnoux, 13-May-2023.)
Hypotheses
Ref Expression
f1ghm0to0.a 𝐴 = (Base‘𝑅)
f1ghm0to0.b 𝐵 = (Base‘𝑆)
f1ghm0to0.n 𝑁 = (0g𝑅)
f1ghm0to0.0 0 = (0g𝑆)
Assertion
Ref Expression
f1ghm0to0 ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴1-1𝐵𝑋𝐴) → ((𝐹𝑋) = 0𝑋 = 𝑁))

Proof of Theorem f1ghm0to0
StepHypRef Expression
1 f1ghm0to0.n . . . . . 6 𝑁 = (0g𝑅)
2 f1ghm0to0.0 . . . . . 6 0 = (0g𝑆)
31, 2ghmid 13379 . . . . 5 (𝐹 ∈ (𝑅 GrpHom 𝑆) → (𝐹𝑁) = 0 )
433ad2ant1 1020 . . . 4 ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴1-1𝐵𝑋𝐴) → (𝐹𝑁) = 0 )
54eqeq2d 2208 . . 3 ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴1-1𝐵𝑋𝐴) → ((𝐹𝑋) = (𝐹𝑁) ↔ (𝐹𝑋) = 0 ))
6 simp2 1000 . . . 4 ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴1-1𝐵𝑋𝐴) → 𝐹:𝐴1-1𝐵)
7 simp3 1001 . . . 4 ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴1-1𝐵𝑋𝐴) → 𝑋𝐴)
8 ghmgrp1 13375 . . . . . 6 (𝐹 ∈ (𝑅 GrpHom 𝑆) → 𝑅 ∈ Grp)
9 f1ghm0to0.a . . . . . . 7 𝐴 = (Base‘𝑅)
109, 1grpidcl 13161 . . . . . 6 (𝑅 ∈ Grp → 𝑁𝐴)
118, 10syl 14 . . . . 5 (𝐹 ∈ (𝑅 GrpHom 𝑆) → 𝑁𝐴)
12113ad2ant1 1020 . . . 4 ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴1-1𝐵𝑋𝐴) → 𝑁𝐴)
13 f1veqaeq 5816 . . . 4 ((𝐹:𝐴1-1𝐵 ∧ (𝑋𝐴𝑁𝐴)) → ((𝐹𝑋) = (𝐹𝑁) → 𝑋 = 𝑁))
146, 7, 12, 13syl12anc 1247 . . 3 ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴1-1𝐵𝑋𝐴) → ((𝐹𝑋) = (𝐹𝑁) → 𝑋 = 𝑁))
155, 14sylbird 170 . 2 ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴1-1𝐵𝑋𝐴) → ((𝐹𝑋) = 0𝑋 = 𝑁))
16 fveq2 5558 . . . 4 (𝑋 = 𝑁 → (𝐹𝑋) = (𝐹𝑁))
1716, 4sylan9eqr 2251 . . 3 (((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴1-1𝐵𝑋𝐴) ∧ 𝑋 = 𝑁) → (𝐹𝑋) = 0 )
1817ex 115 . 2 ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴1-1𝐵𝑋𝐴) → (𝑋 = 𝑁 → (𝐹𝑋) = 0 ))
1915, 18impbid 129 1 ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴1-1𝐵𝑋𝐴) → ((𝐹𝑋) = 0𝑋 = 𝑁))
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105  w3a 980   = wceq 1364  wcel 2167  1-1wf1 5255  cfv 5258  (class class class)co 5922  Basecbs 12678  0gc0g 12927  Grpcgrp 13132   GrpHom cghm 13370
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 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-coll 4148  ax-sep 4151  ax-pow 4207  ax-pr 4242  ax-un 4468  ax-setind 4573  ax-cnex 7970  ax-resscn 7971  ax-1re 7973  ax-addrcl 7976
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-ral 2480  df-rex 2481  df-reu 2482  df-rmo 2483  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-pw 3607  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-int 3875  df-iun 3918  df-br 4034  df-opab 4095  df-mpt 4096  df-id 4328  df-xp 4669  df-rel 4670  df-cnv 4671  df-co 4672  df-dm 4673  df-rn 4674  df-res 4675  df-ima 4676  df-iota 5219  df-fun 5260  df-fn 5261  df-f 5262  df-f1 5263  df-fo 5264  df-f1o 5265  df-fv 5266  df-riota 5877  df-ov 5925  df-oprab 5926  df-mpo 5927  df-inn 8991  df-2 9049  df-ndx 12681  df-slot 12682  df-base 12684  df-plusg 12768  df-0g 12929  df-mgm 12999  df-sgrp 13045  df-mnd 13058  df-grp 13135  df-ghm 13371
This theorem is referenced by:  ghmf1  13403  kerf1ghm  13404
  Copyright terms: Public domain W3C validator