Theorem grplidd 18957

Description: The identity element of a group is a left identity. Deduction associated with grplid 18955. (Contributed by SN, 29-Jan-2025.)

Hypotheses

Ref	Expression
grpbn0.b	⊢ 𝐵 = (Base‘𝐺)
grplid.p	⊢ + = (+g‘𝐺)
grplid.o	⊢ 0 = (0g‘𝐺)
grplidd.g	⊢ (𝜑 → 𝐺 ∈ Grp)
grplidd.1	⊢ (𝜑 → 𝑋 ∈ 𝐵)

Assertion

Ref	Expression
grplidd	⊢ (𝜑 → ( 0 + 𝑋) = 𝑋)

Proof of Theorem grplidd

Step	Hyp	Ref	Expression
1		grplidd.g	. 2 ⊢ (𝜑 → 𝐺 ∈ Grp)
2		grplidd.1	. 2 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
3		grpbn0.b	. . 3 ⊢ 𝐵 = (Base‘𝐺)
4		grplid.p	. . 3 ⊢ + = (+g‘𝐺)
5		grplid.o	. . 3 ⊢ 0 = (0g‘𝐺)
6	3, 4, 5	grplid 18955	. 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵) → ( 0 + 𝑋) = 𝑋)
7	1, 2, 6	syl2anc 584	1 ⊢ (𝜑 → ( 0 + 𝑋) = 𝑋)

Syntax hints:   → wi 4   = wceq 1539   ∈ wcel 2107  ‘cfv 6541  (class class class)co 7413  Basecbs 17230  +_gcplusg 17274  0_gc0g 17456  Grpcgrp 18921

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1794  ax-4 1808  ax-5 1909  ax-6 1966  ax-7 2006  ax-8 2109  ax-9 2117  ax-10 2140  ax-11 2156  ax-12 2176  ax-ext 2706  ax-sep 5276  ax-nul 5286  ax-pr 5412

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1779  df-nf 1783  df-sb 2064  df-mo 2538  df-eu 2567  df-clab 2713  df-cleq 2726  df-clel 2808  df-nfc 2884  df-ne 2932  df-ral 3051  df-rex 3060  df-rmo 3363  df-reu 3364  df-rab 3420  df-v 3465  df-sbc 3771  df-dif 3934  df-un 3936  df-ss 3948  df-nul 4314  df-if 4506  df-sn 4607  df-pr 4609  df-op 4613  df-uni 4888  df-br 5124  df-opab 5186  df-mpt 5206  df-id 5558  df-xp 5671  df-rel 5672  df-cnv 5673  df-co 5674  df-dm 5675  df-iota 6494  df-fun 6543  df-fv 6549  df-riota 7370  df-ov 7416  df-0g 17458  df-mgm 18623  df-sgrp 18702  df-mnd 18718  df-grp 18924

This theorem is referenced by:  eqger  19166  conjnmz  19240  rngqiprngimfolem  21263  rngqiprngfulem5  21288  mhpaddcl  22104  r1pid2  26138  erler  33213  rlocaddval  33216  rlocmulval  33217  rloccring  33218  rloc0g  33219  ofldchr  33289  qsnzr  33423  qsdrngilem  33462  r1pid2OLD  33569  dimkerim  33618  rtelextdg2lem  33711  primrootspoweq0  42082  aks6d1c6lem5  42153  grpcominv1  42497