Theorem ismgmn0 17067

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 2680	. . . 4 ⊢ (𝐴 ∈ 𝐵 ↔ 𝐴 ∈ (Base‘𝑀))
3	2	biimpi 205	. . 3 ⊢ (𝐴 ∈ 𝐵 → 𝐴 ∈ (Base‘𝑀))
4	3	elfvexd 6132	. 2 ⊢ (𝐴 ∈ 𝐵 → 𝑀 ∈ V)
5		ismgmn0.o	. . 3 ⊢ ⚬ = (+g‘𝑀)
6	1, 5	ismgm 17066	. 2 ⊢ (𝑀 ∈ V → (𝑀 ∈ Mgm ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 (𝑥 ⚬ 𝑦) ∈ 𝐵))
7	4, 6	syl 17	1 ⊢ (𝐴 ∈ 𝐵 → (𝑀 ∈ Mgm ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 (𝑥 ⚬ 𝑦) ∈ 𝐵))

Syntax hints:   → wi 4   ↔ wb 195   = wceq 1475   ∈ wcel 1977  ∀wral 2896  Vcvv 3173  ‘cfv 5804  (class class class)co 6549  Basecbs 15695  +_gcplusg 15768  Mgmcmgm 17063

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-nul 4717  ax-pow 4769

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-ral 2901  df-rex 2902  df-rab 2905  df-v 3175  df-sbc 3403  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-br 4584  df-dm 5048  df-iota 5768  df-fv 5812  df-ov 6552  df-mgm 17065

This theorem is referenced by:  mgm1  17080  opifismgm  17081  issgrpn0  17110  xrsmgm  19600  mgmpropd  41565  opmpt2ismgm  41597  nnsgrpmgm  41606  2zrngamgm  41729  2zrngmmgm  41736