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| Mirrors > Home > MPE Home > Th. List > irredn0 | Structured version Visualization version GIF version | ||
| Description: The additive identity is not irreducible. (Contributed by Mario Carneiro, 4-Dec-2014.) |
| Ref | Expression |
|---|---|
| irredn0.i | ⊢ 𝐼 = (Irred‘𝑅) |
| irredn0.z | ⊢ 0 = (0g‘𝑅) |
| Ref | Expression |
|---|---|
| irredn0 | ⊢ ((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐼) → 𝑋 ≠ 0 ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2761 | . . . . . . . . . 10 ⊢ (Base‘𝑅) = (Base‘𝑅) | |
| 2 | irredn0.z | . . . . . . . . . 10 ⊢ 0 = (0g‘𝑅) | |
| 3 | 1, 2 | ring0cl 20296 | . . . . . . . . 9 ⊢ (𝑅 ∈ Ring → 0 ∈ (Base‘𝑅)) |
| 4 | 3 | anim1i 624 | . . . . . . . 8 ⊢ ((𝑅 ∈ Ring ∧ ¬ 0 ∈ (Unit‘𝑅)) → ( 0 ∈ (Base‘𝑅) ∧ ¬ 0 ∈ (Unit‘𝑅))) |
| 5 | eldif 3914 | . . . . . . . 8 ⊢ ( 0 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅)) ↔ ( 0 ∈ (Base‘𝑅) ∧ ¬ 0 ∈ (Unit‘𝑅))) | |
| 6 | 4, 5 | sylibr 236 | . . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ ¬ 0 ∈ (Unit‘𝑅)) → 0 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))) |
| 7 | eqid 2761 | . . . . . . . . . 10 ⊢ (.r‘𝑅) = (.r‘𝑅) | |
| 8 | 1, 7, 2 | ringlz 20322 | . . . . . . . . 9 ⊢ ((𝑅 ∈ Ring ∧ 0 ∈ (Base‘𝑅)) → ( 0 (.r‘𝑅) 0 ) = 0 ) |
| 9 | 3, 8 | mpdan 697 | . . . . . . . 8 ⊢ (𝑅 ∈ Ring → ( 0 (.r‘𝑅) 0 ) = 0 ) |
| 10 | 9 | adantr 484 | . . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ ¬ 0 ∈ (Unit‘𝑅)) → ( 0 (.r‘𝑅) 0 ) = 0 ) |
| 11 | oveq1 7399 | . . . . . . . . 9 ⊢ (𝑥 = 0 → (𝑥(.r‘𝑅)𝑦) = ( 0 (.r‘𝑅)𝑦)) | |
| 12 | 11 | eqeq1d 2763 | . . . . . . . 8 ⊢ (𝑥 = 0 → ((𝑥(.r‘𝑅)𝑦) = 0 ↔ ( 0 (.r‘𝑅)𝑦) = 0 )) |
| 13 | oveq2 7400 | . . . . . . . . 9 ⊢ (𝑦 = 0 → ( 0 (.r‘𝑅)𝑦) = ( 0 (.r‘𝑅) 0 )) | |
| 14 | 13 | eqeq1d 2763 | . . . . . . . 8 ⊢ (𝑦 = 0 → (( 0 (.r‘𝑅)𝑦) = 0 ↔ ( 0 (.r‘𝑅) 0 ) = 0 )) |
| 15 | 12, 14 | rspc2ev 3594 | . . . . . . 7 ⊢ (( 0 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅)) ∧ 0 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅)) ∧ ( 0 (.r‘𝑅) 0 ) = 0 ) → ∃𝑥 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))∃𝑦 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))(𝑥(.r‘𝑅)𝑦) = 0 ) |
| 16 | 6, 6, 10, 15 | syl3anc 1389 | . . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ ¬ 0 ∈ (Unit‘𝑅)) → ∃𝑥 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))∃𝑦 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))(𝑥(.r‘𝑅)𝑦) = 0 ) |
| 17 | 16 | ex 416 | . . . . 5 ⊢ (𝑅 ∈ Ring → (¬ 0 ∈ (Unit‘𝑅) → ∃𝑥 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))∃𝑦 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))(𝑥(.r‘𝑅)𝑦) = 0 )) |
| 18 | 17 | orrd 874 | . . . 4 ⊢ (𝑅 ∈ Ring → ( 0 ∈ (Unit‘𝑅) ∨ ∃𝑥 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))∃𝑦 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))(𝑥(.r‘𝑅)𝑦) = 0 )) |
| 19 | eqid 2761 | . . . . . 6 ⊢ (Unit‘𝑅) = (Unit‘𝑅) | |
| 20 | irredn0.i | . . . . . 6 ⊢ 𝐼 = (Irred‘𝑅) | |
| 21 | eqid 2761 | . . . . . 6 ⊢ ((Base‘𝑅) ∖ (Unit‘𝑅)) = ((Base‘𝑅) ∖ (Unit‘𝑅)) | |
| 22 | 1, 19, 20, 21, 7 | isnirred 20448 | . . . . 5 ⊢ ( 0 ∈ (Base‘𝑅) → (¬ 0 ∈ 𝐼 ↔ ( 0 ∈ (Unit‘𝑅) ∨ ∃𝑥 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))∃𝑦 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))(𝑥(.r‘𝑅)𝑦) = 0 ))) |
| 23 | 3, 22 | syl 17 | . . . 4 ⊢ (𝑅 ∈ Ring → (¬ 0 ∈ 𝐼 ↔ ( 0 ∈ (Unit‘𝑅) ∨ ∃𝑥 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))∃𝑦 ∈ ((Base‘𝑅) ∖ (Unit‘𝑅))(𝑥(.r‘𝑅)𝑦) = 0 ))) |
| 24 | 18, 23 | mpbird 259 | . . 3 ⊢ (𝑅 ∈ Ring → ¬ 0 ∈ 𝐼) |
| 25 | 24 | adantr 484 | . 2 ⊢ ((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐼) → ¬ 0 ∈ 𝐼) |
| 26 | simpr 488 | . . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐼) → 𝑋 ∈ 𝐼) | |
| 27 | eleq1 2849 | . . . 4 ⊢ (𝑋 = 0 → (𝑋 ∈ 𝐼 ↔ 0 ∈ 𝐼)) | |
| 28 | 26, 27 | syl5ibcom 247 | . . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐼) → (𝑋 = 0 → 0 ∈ 𝐼)) |
| 29 | 28 | necon3bd 2970 | . 2 ⊢ ((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐼) → (¬ 0 ∈ 𝐼 → 𝑋 ≠ 0 )) |
| 30 | 25, 29 | mpd 15 | 1 ⊢ ((𝑅 ∈ Ring ∧ 𝑋 ∈ 𝐼) → 𝑋 ≠ 0 ) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 ∧ wa 399 ∨ wo 858 = wceq 1559 ∈ wcel 2141 ≠ wne 2956 ∃wrex 3085 ∖ cdif 3901 ‘cfv 6517 (class class class)co 7392 Basecbs 17228 .rcmulr 17270 0gc0g 17451 Ringcrg 20262 Unitcui 20383 Irredcir 20384 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5245 ax-nul 5255 ax-pow 5321 ax-pr 5389 ax-un 7714 ax-cnex 11126 ax-resscn 11127 ax-1cn 11128 ax-icn 11129 ax-addcl 11130 ax-addrcl 11131 ax-mulcl 11132 ax-mulrcl 11133 ax-mulcom 11134 ax-addass 11135 ax-mulass 11136 ax-distr 11137 ax-i2m1 11138 ax-1ne0 11139 ax-1rid 11140 ax-rnegex 11141 ax-rrecex 11142 ax-cnre 11143 ax-pre-lttri 11144 ax-pre-lttrn 11145 ax-pre-ltadd 11146 ax-pre-mulgt0 11147 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4950 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5540 df-eprel 5545 df-po 5553 df-so 5554 df-fr 5598 df-we 5600 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-pred 6284 df-ord 6345 df-on 6346 df-lim 6347 df-suc 6348 df-iota 6473 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-fv 6525 df-riota 7349 df-ov 7395 df-oprab 7396 df-mpo 7397 df-om 7843 df-2nd 7967 df-frecs 8257 df-wrecs 8288 df-recs 8337 df-rdg 8376 df-er 8673 df-en 8924 df-dom 8925 df-sdom 8926 df-pnf 11215 df-mnf 11216 df-xr 11217 df-ltxr 11218 df-le 11219 df-sub 11413 df-neg 11414 df-nn 12208 df-2 12277 df-sets 17183 df-slot 17201 df-ndx 17213 df-base 17229 df-plusg 17282 df-0g 17453 df-mgm 18657 df-sgrp 18736 df-mnd 18752 df-grp 18961 df-minusg 18962 df-cmn 19805 df-abl 19806 df-mgp 20170 df-rng 20182 df-ur 20211 df-ring 20264 df-irred 20387 |
| This theorem is referenced by: prmirred 21506 irrednzr 33392 rprmirredb 33689 2sqr3minply 34038 cos9thpiminply 34046 |
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