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Theorem ismgmd 42286
Description: Deduce a magma from its properties. (Contributed by AV, 25-Feb-2020.)
Hypotheses
Ref Expression
ismgmd.b (𝜑𝐵 = (Base‘𝐺))
ismgmd.0 (𝜑𝐺𝑉)
ismgmd.p (𝜑+ = (+g𝐺))
ismgmd.c ((𝜑𝑥𝐵𝑦𝐵) → (𝑥 + 𝑦) ∈ 𝐵)
Assertion
Ref Expression
ismgmd (𝜑𝐺 ∈ Mgm)
Distinct variable groups:   𝑥,𝑦,𝐵   𝑥,𝐺,𝑦   𝜑,𝑥,𝑦
Allowed substitution hints:   + (𝑥,𝑦)   𝑉(𝑥,𝑦)

Proof of Theorem ismgmd
StepHypRef Expression
1 ismgmd.c . . . . 5 ((𝜑𝑥𝐵𝑦𝐵) → (𝑥 + 𝑦) ∈ 𝐵)
213expb 1114 . . . 4 ((𝜑 ∧ (𝑥𝐵𝑦𝐵)) → (𝑥 + 𝑦) ∈ 𝐵)
32ralrimivva 3109 . . 3 (𝜑 → ∀𝑥𝐵𝑦𝐵 (𝑥 + 𝑦) ∈ 𝐵)
4 ismgmd.b . . . 4 (𝜑𝐵 = (Base‘𝐺))
5 ismgmd.p . . . . . . 7 (𝜑+ = (+g𝐺))
65oveqd 6830 . . . . . 6 (𝜑 → (𝑥 + 𝑦) = (𝑥(+g𝐺)𝑦))
76, 4eleq12d 2833 . . . . 5 (𝜑 → ((𝑥 + 𝑦) ∈ 𝐵 ↔ (𝑥(+g𝐺)𝑦) ∈ (Base‘𝐺)))
84, 7raleqbidv 3291 . . . 4 (𝜑 → (∀𝑦𝐵 (𝑥 + 𝑦) ∈ 𝐵 ↔ ∀𝑦 ∈ (Base‘𝐺)(𝑥(+g𝐺)𝑦) ∈ (Base‘𝐺)))
94, 8raleqbidv 3291 . . 3 (𝜑 → (∀𝑥𝐵𝑦𝐵 (𝑥 + 𝑦) ∈ 𝐵 ↔ ∀𝑥 ∈ (Base‘𝐺)∀𝑦 ∈ (Base‘𝐺)(𝑥(+g𝐺)𝑦) ∈ (Base‘𝐺)))
103, 9mpbid 222 . 2 (𝜑 → ∀𝑥 ∈ (Base‘𝐺)∀𝑦 ∈ (Base‘𝐺)(𝑥(+g𝐺)𝑦) ∈ (Base‘𝐺))
11 ismgmd.0 . . 3 (𝜑𝐺𝑉)
12 eqid 2760 . . . 4 (Base‘𝐺) = (Base‘𝐺)
13 eqid 2760 . . . 4 (+g𝐺) = (+g𝐺)
1412, 13ismgm 17444 . . 3 (𝐺𝑉 → (𝐺 ∈ Mgm ↔ ∀𝑥 ∈ (Base‘𝐺)∀𝑦 ∈ (Base‘𝐺)(𝑥(+g𝐺)𝑦) ∈ (Base‘𝐺)))
1511, 14syl 17 . 2 (𝜑 → (𝐺 ∈ Mgm ↔ ∀𝑥 ∈ (Base‘𝐺)∀𝑦 ∈ (Base‘𝐺)(𝑥(+g𝐺)𝑦) ∈ (Base‘𝐺)))
1610, 15mpbird 247 1 (𝜑𝐺 ∈ Mgm)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  w3a 1072   = wceq 1632  wcel 2139  wral 3050  cfv 6049  (class class class)co 6813  Basecbs 16059  +gcplusg 16143  Mgmcmgm 17441
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740  ax-nul 4941
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2047  df-eu 2611  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ral 3055  df-rex 3056  df-rab 3059  df-v 3342  df-sbc 3577  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-nul 4059  df-if 4231  df-sn 4322  df-pr 4324  df-op 4328  df-uni 4589  df-br 4805  df-iota 6012  df-fv 6057  df-ov 6816  df-mgm 17443
This theorem is referenced by:  issubmgm2  42300
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