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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 6926 | . 2 ⊢ (𝐴 ∈ 𝐵 → 𝑀 ∈ V) |
| 5 | ismgmn0.o | . . 3 ⊢ ⚬ = (+g‘𝑀) | |
| 6 | 1, 5 | ismgm 18826 | . 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 1569 ∈ wcel 2144 ∀wral 3076 Vcvv 3450 ‘cfv 6543 (class class class)co 7424 Basecbs 17396 +gcplusg 17437 Mgmcmgm 18823 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-nul 5259 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 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 3739 df-ss 3897 df-dif 4046 df-un 4150 df-nul 4278 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-dm 5661 df-iota 6497 df-fv 6551 df-ov 7427 df-mgm 18825 |
| This theorem is used by: mgmpropd 18838 mgm1 18845 opifismgm 18846 issgrpn0 18920 degenmgm 19146 degenmgm2 19149 xrsmgm 21722 opmpoismgm 49400 nnsgrpmgm 49409 2zrngamgm 49478 2zrngmmgm 49485 |
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