Theorem gim0to0 19238

Description: A group isomorphism 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, 23-May-2023.)

Hypotheses

Ref	Expression
gim0to0.a	⊢ 𝐴 = (Base‘𝑅)
gim0to0.b	⊢ 𝐵 = (Base‘𝑆)
gim0to0.n	⊢ 𝑁 = (0g‘𝑆)
gim0to0.0	⊢ 0 = (0g‘𝑅)

Assertion

Ref	Expression
gim0to0	⊢ ((𝐹 ∈ (𝑅 GrpIso 𝑆) ∧ 𝑋 ∈ 𝐴) → ((𝐹‘𝑋) = 𝑁 ↔ 𝑋 = 0 ))

Proof of Theorem gim0to0

Step	Hyp	Ref	Expression
1		gimghm 19233	. . . . 5 ⊢ (𝐹 ∈ (𝑅 GrpIso 𝑆) → 𝐹 ∈ (𝑅 GrpHom 𝑆))
2		gim0to0.a	. . . . . . 7 ⊢ 𝐴 = (Base‘𝑅)
3		gim0to0.b	. . . . . . 7 ⊢ 𝐵 = (Base‘𝑆)
4	2, 3	gimf1o 19232	. . . . . 6 ⊢ (𝐹 ∈ (𝑅 GrpIso 𝑆) → 𝐹:𝐴–1-1-onto→𝐵)
5		f1of1 6774	. . . . . 6 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹:𝐴–1-1→𝐵)
6	4, 5	syl 17	. . . . 5 ⊢ (𝐹 ∈ (𝑅 GrpIso 𝑆) → 𝐹:𝐴–1-1→𝐵)
7	1, 6	jca 511	. . . 4 ⊢ (𝐹 ∈ (𝑅 GrpIso 𝑆) → (𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴–1-1→𝐵))
8	7	anim1i 616	. . 3 ⊢ ((𝐹 ∈ (𝑅 GrpIso 𝑆) ∧ 𝑋 ∈ 𝐴) → ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴–1-1→𝐵) ∧ 𝑋 ∈ 𝐴))
9		df-3an 1089	. . 3 ⊢ ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴–1-1→𝐵 ∧ 𝑋 ∈ 𝐴) ↔ ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴–1-1→𝐵) ∧ 𝑋 ∈ 𝐴))
10	8, 9	sylibr 234	. 2 ⊢ ((𝐹 ∈ (𝑅 GrpIso 𝑆) ∧ 𝑋 ∈ 𝐴) → (𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴–1-1→𝐵 ∧ 𝑋 ∈ 𝐴))
11		gim0to0.0	. . 3 ⊢ 0 = (0g‘𝑅)
12		gim0to0.n	. . 3 ⊢ 𝑁 = (0g‘𝑆)
13	2, 3, 11, 12	f1ghm0to0 19214	. 2 ⊢ ((𝐹 ∈ (𝑅 GrpHom 𝑆) ∧ 𝐹:𝐴–1-1→𝐵 ∧ 𝑋 ∈ 𝐴) → ((𝐹‘𝑋) = 𝑁 ↔ 𝑋 = 0 ))
14	10, 13	syl 17	1 ⊢ ((𝐹 ∈ (𝑅 GrpIso 𝑆) ∧ 𝑋 ∈ 𝐴) → ((𝐹‘𝑋) = 𝑁 ↔ 𝑋 = 0 ))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1087   = wceq 1542   ∈ wcel 2114  –1-1→wf1 6490  –1-1-onto→wf1o 6492  ‘cfv 6493  (class class class)co 7361  Basecbs 17173  0_gc0g 17396   GrpHom cghm 19181   GrpIso cgim 19226

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-sep 5232  ax-nul 5242  ax-pow 5303  ax-pr 5371  ax-un 7683

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-ral 3053  df-rex 3063  df-rmo 3343  df-reu 3344  df-rab 3391  df-v 3432  df-sbc 3730  df-csb 3839  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-nul 4275  df-if 4468  df-pw 4544  df-sn 4569  df-pr 4571  df-op 4575  df-uni 4852  df-iun 4936  df-br 5087  df-opab 5149  df-mpt 5168  df-id 5520  df-xp 5631  df-rel 5632  df-cnv 5633  df-co 5634  df-dm 5635  df-rn 5636  df-res 5637  df-ima 5638  df-iota 6449  df-fun 6495  df-fn 6496  df-f 6497  df-f1 6498  df-fo 6499  df-f1o 6500  df-fv 6501  df-riota 7318  df-ov 7364  df-oprab 7365  df-mpo 7366  df-1st 7936  df-2nd 7937  df-map 8769  df-0g 17398  df-mgm 18602  df-sgrp 18681  df-mnd 18697  df-grp 18906  df-ghm 19182  df-gim 19228

This theorem is referenced by: (None)