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| Mirrors > Home > MPE Home > Th. List > ismgmn0 | Structured version Visualization version GIF version | ||
| Description: The predicate "is a magma" for a structure with a nonempty base set. (Contributed by AV, 29-Jan-2020.) |
| Ref | Expression |
|---|---|
| ismgmn0.b | ⊢ 𝐵 = (Base‘𝑀) |
| ismgmn0.o | ⊢ ⚬ = (+g‘𝑀) |
| Ref | Expression |
|---|---|
| ismgmn0 | ⊢ (𝐴 ∈ 𝐵 → (𝑀 ∈ Mgm ↔ ∀𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 (𝑥 ⚬ 𝑦) ∈ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ismgmn0.b | . . . . 5 ⊢ 𝐵 = (Base‘𝑀) | |
| 2 | 1 | eleq2i 2852 | . . . 4 ⊢ (𝐴 ∈ 𝐵 ↔ 𝐴 ∈ (Base‘𝑀)) |
| 3 | 2 | biimpi 219 | . . 3 ⊢ (𝐴 ∈ 𝐵 → 𝐴 ∈ (Base‘𝑀)) |
| 4 | 3 | elfvexd 6915 | . 2 ⊢ (𝐴 ∈ 𝐵 → 𝑀 ∈ V) |
| 5 | ismgmn0.o | . . 3 ⊢ ⚬ = (+g‘𝑀) | |
| 6 | 1, 5 | ismgm 18732 | . 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)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2145 ∀wral 3076 Vcvv 3450 ‘cfv 6533 (class class class)co 7414 Basecbs 17302 +gcplusg 17343 Mgmcmgm 18729 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2732 ax-nul 5263 ax-pr 5398 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-ral 3077 df-rab 3413 df-v 3452 df-sbc 3740 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-dm 5665 df-iota 6489 df-fv 6541 df-ov 7417 df-mgm 18731 |
| This theorem is used by: mgmpropd 18744 mgm1 18751 opifismgm 18752 issgrpn0 18825 degenmgm 19051 degenmgm2 19054 xrsmgm 21621 opmpoismgm 49083 nnsgrpmgm 49092 2zrngamgm 49161 2zrngmmgm 49168 |
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