Theorem ismgmn0 18558

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 2825	. . . 4 ⊢ (𝐴 ∈ 𝐵 ↔ 𝐴 ∈ (Base‘𝑀))
3	2	biimpi 216	. . 3 ⊢ (𝐴 ∈ 𝐵 → 𝐴 ∈ (Base‘𝑀))
4	3	elfvexd 6867	. 2 ⊢ (𝐴 ∈ 𝐵 → 𝑀 ∈ V)
5		ismgmn0.o	. . 3 ⊢ ⚬ = (+g‘𝑀)
6	1, 5	ismgm 18557	. 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 206   = wceq 1541   ∈ wcel 2113  ∀wral 3048  Vcvv 3437  ‘cfv 6489  (class class class)co 7355  Basecbs 17127  +_gcplusg 17168  Mgmcmgm 18554

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2705  ax-nul 5248  ax-pr 5374

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-mo 2537  df-eu 2566  df-clab 2712  df-cleq 2725  df-clel 2808  df-ne 2930  df-ral 3049  df-rab 3397  df-v 3439  df-sbc 3738  df-dif 3901  df-un 3903  df-ss 3915  df-nul 4283  df-if 4477  df-sn 4578  df-pr 4580  df-op 4584  df-uni 4861  df-br 5096  df-dm 5631  df-iota 6445  df-fv 6497  df-ov 7358  df-mgm 18556

This theorem is referenced by:  mgmpropd  18567  mgm1  18574  opifismgm  18575  issgrpn0  18638  xrsmgm  21352  opmpoismgm  48329  nnsgrpmgm  48338  2zrngamgm  48407  2zrngmmgm  48414