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| Mirrors > Home > ILE Home > Th. List > srglz | GIF version | ||
| Description: The zero of a semiring is a left-absorbing element. (Contributed by AV, 23-Aug-2019.) |
| Ref | Expression |
|---|---|
| srgz.b | ⊢ 𝐵 = (Base‘𝑅) |
| srgz.t | ⊢ · = (.r‘𝑅) |
| srgz.z | ⊢ 0 = (0g‘𝑅) |
| Ref | Expression |
|---|---|
| srglz | ⊢ ((𝑅 ∈ SRing ∧ 𝑋 ∈ 𝐵) → ( 0 · 𝑋) = 0 ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | srgz.b | . . . . . . 7 ⊢ 𝐵 = (Base‘𝑅) | |
| 2 | eqid 2238 | . . . . . . 7 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅) | |
| 3 | eqid 2238 | . . . . . . 7 ⊢ (+g‘𝑅) = (+g‘𝑅) | |
| 4 | srgz.t | . . . . . . 7 ⊢ · = (.r‘𝑅) | |
| 5 | srgz.z | . . . . . . 7 ⊢ 0 = (0g‘𝑅) | |
| 6 | 1, 2, 3, 4, 5 | issrg 14271 | . . . . . 6 ⊢ (𝑅 ∈ SRing ↔ (𝑅 ∈ CMnd ∧ (mulGrp‘𝑅) ∈ Mnd ∧ ∀𝑥 ∈ 𝐵 (∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ((𝑥 · (𝑦(+g‘𝑅)𝑧)) = ((𝑥 · 𝑦)(+g‘𝑅)(𝑥 · 𝑧)) ∧ ((𝑥(+g‘𝑅)𝑦) · 𝑧) = ((𝑥 · 𝑧)(+g‘𝑅)(𝑦 · 𝑧))) ∧ (( 0 · 𝑥) = 0 ∧ (𝑥 · 0 ) = 0 )))) |
| 7 | 6 | simp3bi 1045 | . . . . 5 ⊢ (𝑅 ∈ SRing → ∀𝑥 ∈ 𝐵 (∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ((𝑥 · (𝑦(+g‘𝑅)𝑧)) = ((𝑥 · 𝑦)(+g‘𝑅)(𝑥 · 𝑧)) ∧ ((𝑥(+g‘𝑅)𝑦) · 𝑧) = ((𝑥 · 𝑧)(+g‘𝑅)(𝑦 · 𝑧))) ∧ (( 0 · 𝑥) = 0 ∧ (𝑥 · 0 ) = 0 ))) |
| 8 | 7 | r19.21bi 2638 | . . . 4 ⊢ ((𝑅 ∈ SRing ∧ 𝑥 ∈ 𝐵) → (∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ((𝑥 · (𝑦(+g‘𝑅)𝑧)) = ((𝑥 · 𝑦)(+g‘𝑅)(𝑥 · 𝑧)) ∧ ((𝑥(+g‘𝑅)𝑦) · 𝑧) = ((𝑥 · 𝑧)(+g‘𝑅)(𝑦 · 𝑧))) ∧ (( 0 · 𝑥) = 0 ∧ (𝑥 · 0 ) = 0 ))) |
| 9 | 8 | simprld 536 | . . 3 ⊢ ((𝑅 ∈ SRing ∧ 𝑥 ∈ 𝐵) → ( 0 · 𝑥) = 0 ) |
| 10 | 9 | ralrimiva 2623 | . 2 ⊢ (𝑅 ∈ SRing → ∀𝑥 ∈ 𝐵 ( 0 · 𝑥) = 0 ) |
| 11 | oveq2 6093 | . . . 4 ⊢ (𝑥 = 𝑋 → ( 0 · 𝑥) = ( 0 · 𝑋)) | |
| 12 | 11 | eqeq1d 2247 | . . 3 ⊢ (𝑥 = 𝑋 → (( 0 · 𝑥) = 0 ↔ ( 0 · 𝑋) = 0 )) |
| 13 | 12 | rspcv 2925 | . 2 ⊢ (𝑋 ∈ 𝐵 → (∀𝑥 ∈ 𝐵 ( 0 · 𝑥) = 0 → ( 0 · 𝑋) = 0 )) |
| 14 | 10, 13 | mpan9 281 | 1 ⊢ ((𝑅 ∈ SRing ∧ 𝑋 ∈ 𝐵) → ( 0 · 𝑋) = 0 ) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 = wceq 1402 ∈ wcel 2209 ∀wral 2528 ‘cfv 5377 (class class class)co 6085 Basecbs 13354 +gcplusg 13433 .rcmulr 13434 0gc0g 13612 Mndcmnd 13731 CMndccmn 14089 mulGrpcmgp 14219 SRingcsrg 14269 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-cnex 8270 ax-resscn 8271 ax-1re 8273 ax-addrcl 8276 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-sbc 3052 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4131 df-opab 4193 df-mpt 4194 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-iota 5337 df-fun 5379 df-fn 5380 df-fv 5385 df-riota 6038 df-ov 6088 df-inn 9306 df-2 9364 df-3 9365 df-ndx 13357 df-slot 13358 df-base 13360 df-plusg 13446 df-mulr 13447 df-0g 13614 df-srg 14270 |
| This theorem is used by: srgmulgass 14295 srgrmhm 14300 |
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