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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 2857 | . . . 4 ⊢ (𝐴 ∈ 𝐵 ↔ 𝐴 ∈ (Base‘𝑀)) |
| 3 | 2 | biimpi 219 | . . 3 ⊢ (𝐴 ∈ 𝐵 → 𝐴 ∈ (Base‘𝑀)) |
| 4 | 3 | elfvexd 6921 | . 2 ⊢ (𝐴 ∈ 𝐵 → 𝑀 ∈ V) |
| 5 | ismgmn0.o | . . 3 ⊢ ⚬ = (+g‘𝑀) | |
| 6 | 1, 5 | ismgm 18723 | . 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 2146 ∀wral 3081 Vcvv 3457 ‘cfv 6540 (class class class)co 7419 Basecbs 17293 +gcplusg 17334 Mgmcmgm 18720 |
| 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 2148 ax-9 2156 ax-ext 2737 ax-nul 5271 ax-pr 5406 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-ne 2961 df-ral 3082 df-rab 3419 df-v 3459 df-sbc 3747 df-dif 3909 df-un 3911 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-dm 5673 df-iota 6496 df-fv 6548 df-ov 7422 df-mgm 18722 |
| This theorem is used by: mgmpropd 18735 mgm1 18742 opifismgm 18743 issgrpn0 18814 degenmgm 19039 degenmgm2 19042 xrsmgm 21609 opmpoismgm 48991 nnsgrpmgm 49000 2zrngamgm 49069 2zrngmmgm 49076 |
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