Theorem ismgmn0 18699

Description: The predicate "is a magma" for a structure with a nonempty base set. (Contributed by AV, 29-Jan-2020.)

Hypotheses

Ref	Expression
ismgmn0.b	⊢ 𝐵 = (Base‘𝑀)
ismgmn0.o	⊢ ⚬ = (+g‘𝑀)

Assertion

Ref	Expression
ismgmn0	⊢ (𝐴 ∈ 𝐵 → (𝑀 ∈ Mgm ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 (𝑥 ⚬ 𝑦) ∈ 𝐵))

Distinct variable groups:   𝑥,𝐵,𝑦   𝑥,𝑀,𝑦   𝑥, ⚬ ,𝑦

Allowed substitution hints:   𝐴(𝑥,𝑦)

Proof of Theorem ismgmn0

Step	Hyp	Ref	Expression
1		ismgmn0.b	. . . . 5 ⊢ 𝐵 = (Base‘𝑀)
2	1	eleq2i 2861	. . . 4 ⊢ (𝐴 ∈ 𝐵 ↔ 𝐴 ∈ (Base‘𝑀))
3	2	biimpi 219	. . 3 ⊢ (𝐴 ∈ 𝐵 → 𝐴 ∈ (Base‘𝑀))
4	3	elfvexd 6918	. 2 ⊢ (𝐴 ∈ 𝐵 → 𝑀 ∈ V)
5		ismgmn0.o	. . 3 ⊢ ⚬ = (+g‘𝑀)
6	1, 5	ismgm 18698	. 2 ⊢ (𝑀 ∈ V → (𝑀 ∈ Mgm ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 (𝑥 ⚬ 𝑦) ∈ 𝐵))
7	4, 6	syl 18	1 ⊢ (𝐴 ∈ 𝐵 → (𝑀 ∈ Mgm ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 (𝑥 ⚬ 𝑦) ∈ 𝐵))

Syntax hints:   → wi 4   ↔ wb 209   = wceq 1567   ∈ wcel 2149  ∀wral 3085  Vcvv 3463  ‘cfv 6537  (class class class)co 7411  Basecbs 17268  +_gcplusg 17309  Mgmcmgm 18695

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-ext 2741  ax-nul 5271  ax-pr 5405

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-ne 2965  df-ral 3086  df-rab 3424  df-v 3465  df-sbc 3754  df-dif 3916  df-un 3918  df-ss 3930  df-nul 4295  df-if 4493  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4877  df-br 5114  df-dm 5672  df-iota 6493  df-fv 6545  df-ov 7414  df-mgm 18697

This theorem is referenced by:  mgmpropd  18708  mgm1  18715  opifismgm  18716  issgrpn0  18779  xrsmgm  21525  opmpoismgm  48820  nnsgrpmgm  48829  2zrngamgm  48898  2zrngmmgm  48905