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Mirrors > Home > MPE Home > Th. List > Mathboxes > isfld2 | Structured version Visualization version GIF version |
Description: The predicate "is a field". (Contributed by Jeff Madsen, 10-Jun-2010.) |
Ref | Expression |
---|---|
isfld2 | ⊢ (𝐾 ∈ Fld ↔ (𝐾 ∈ DivRingOps ∧ 𝐾 ∈ CRingOps)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | flddivrng 32968 | . . 3 ⊢ (𝐾 ∈ Fld → 𝐾 ∈ DivRingOps) | |
2 | fldcrng 32973 | . . 3 ⊢ (𝐾 ∈ Fld → 𝐾 ∈ CRingOps) | |
3 | 1, 2 | jca 553 | . 2 ⊢ (𝐾 ∈ Fld → (𝐾 ∈ DivRingOps ∧ 𝐾 ∈ CRingOps)) |
4 | iscrngo 32965 | . . . 4 ⊢ (𝐾 ∈ CRingOps ↔ (𝐾 ∈ RingOps ∧ 𝐾 ∈ Com2)) | |
5 | 4 | simprbi 479 | . . 3 ⊢ (𝐾 ∈ CRingOps → 𝐾 ∈ Com2) |
6 | elin 3758 | . . . . 5 ⊢ (𝐾 ∈ (DivRingOps ∩ Com2) ↔ (𝐾 ∈ DivRingOps ∧ 𝐾 ∈ Com2)) | |
7 | 6 | biimpri 217 | . . . 4 ⊢ ((𝐾 ∈ DivRingOps ∧ 𝐾 ∈ Com2) → 𝐾 ∈ (DivRingOps ∩ Com2)) |
8 | df-fld 32961 | . . . 4 ⊢ Fld = (DivRingOps ∩ Com2) | |
9 | 7, 8 | syl6eleqr 2699 | . . 3 ⊢ ((𝐾 ∈ DivRingOps ∧ 𝐾 ∈ Com2) → 𝐾 ∈ Fld) |
10 | 5, 9 | sylan2 490 | . 2 ⊢ ((𝐾 ∈ DivRingOps ∧ 𝐾 ∈ CRingOps) → 𝐾 ∈ Fld) |
11 | 3, 10 | impbii 198 | 1 ⊢ (𝐾 ∈ Fld ↔ (𝐾 ∈ DivRingOps ∧ 𝐾 ∈ CRingOps)) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 195 ∧ wa 383 ∈ wcel 1977 ∩ cin 3539 RingOpscrngo 32863 DivRingOpscdrng 32917 Com2ccm2 32958 Fldcfld 32960 CRingOpsccring 32962 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-sbc 3403 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-iota 5768 df-fun 5806 df-fv 5812 df-1st 7059 df-2nd 7060 df-drngo 32918 df-fld 32961 df-crngo 32963 |
This theorem is referenced by: flddmn 33027 isfldidl 33037 |
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