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Theorem ismgmn0 17604
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 = (+g𝑀)
Assertion
Ref Expression
ismgmn0 (𝐴𝐵 → (𝑀 ∈ Mgm ↔ ∀𝑥𝐵𝑦𝐵 (𝑥 𝑦) ∈ 𝐵))
Distinct variable groups:   𝑥,𝐵,𝑦   𝑥,𝑀,𝑦   𝑥, ,𝑦
Allowed substitution hints:   𝐴(𝑥,𝑦)

Proof of Theorem ismgmn0
StepHypRef Expression
1 ismgmn0.b . . . . 5 𝐵 = (Base‘𝑀)
21eleq2i 2898 . . . 4 (𝐴𝐵𝐴 ∈ (Base‘𝑀))
32biimpi 208 . . 3 (𝐴𝐵𝐴 ∈ (Base‘𝑀))
43elfvexd 6472 . 2 (𝐴𝐵𝑀 ∈ V)
5 ismgmn0.o . . 3 = (+g𝑀)
61, 5ismgm 17603 . 2 (𝑀 ∈ V → (𝑀 ∈ Mgm ↔ ∀𝑥𝐵𝑦𝐵 (𝑥 𝑦) ∈ 𝐵))
74, 6syl 17 1 (𝐴𝐵 → (𝑀 ∈ Mgm ↔ ∀𝑥𝐵𝑦𝐵 (𝑥 𝑦) ∈ 𝐵))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 198   = wceq 1656  wcel 2164  wral 3117  Vcvv 3414  cfv 6127  (class class class)co 6910  Basecbs 16229  +gcplusg 16312  Mgmcmgm 17600
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1894  ax-4 1908  ax-5 2009  ax-6 2075  ax-7 2112  ax-8 2166  ax-9 2173  ax-10 2192  ax-11 2207  ax-12 2220  ax-13 2389  ax-ext 2803  ax-nul 5015  ax-pow 5067
This theorem depends on definitions:  df-bi 199  df-an 387  df-or 879  df-3an 1113  df-tru 1660  df-ex 1879  df-nf 1883  df-sb 2068  df-mo 2605  df-eu 2640  df-clab 2812  df-cleq 2818  df-clel 2821  df-nfc 2958  df-ral 3122  df-rex 3123  df-rab 3126  df-v 3416  df-sbc 3663  df-dif 3801  df-un 3803  df-in 3805  df-ss 3812  df-nul 4147  df-if 4309  df-sn 4400  df-pr 4402  df-op 4406  df-uni 4661  df-br 4876  df-dm 5356  df-iota 6090  df-fv 6135  df-ov 6913  df-mgm 17602
This theorem is referenced by:  mgm1  17617  opifismgm  17618  issgrpn0  17647  xrsmgm  20148  mgmpropd  42636  opmpt2ismgm  42668  nnsgrpmgm  42677  2zrngamgm  42800  2zrngmmgm  42807
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