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| Mirrors > Home > MPE Home > Th. List > abvtrivg | Structured version Visualization version GIF version | ||
| Description: The trivial absolute value. This theorem is not true for rings with zero divisors, which violate the multiplication axiom; abvdom 20933 is the converse of this theorem. (Contributed by SN, 25-Jun-2025.) |
| Ref | Expression |
|---|---|
| abvtriv.a | ⊢ 𝐴 = (AbsVal‘𝑅) |
| abvtriv.b | ⊢ 𝐵 = (Base‘𝑅) |
| abvtriv.z | ⊢ 0 = (0g‘𝑅) |
| abvtriv.f | ⊢ 𝐹 = (𝑥 ∈ 𝐵 ↦ if(𝑥 = 0 , 0, 1)) |
| Ref | Expression |
|---|---|
| abvtrivg | ⊢ (𝑅 ∈ Domn → 𝐹 ∈ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | abvtriv.a | . 2 ⊢ 𝐴 = (AbsVal‘𝑅) | |
| 2 | abvtriv.b | . 2 ⊢ 𝐵 = (Base‘𝑅) | |
| 3 | abvtriv.z | . 2 ⊢ 0 = (0g‘𝑅) | |
| 4 | abvtriv.f | . 2 ⊢ 𝐹 = (𝑥 ∈ 𝐵 ↦ if(𝑥 = 0 , 0, 1)) | |
| 5 | eqid 2763 | . 2 ⊢ (.r‘𝑅) = (.r‘𝑅) | |
| 6 | domnring 20806 | . 2 ⊢ (𝑅 ∈ Domn → 𝑅 ∈ Ring) | |
| 7 | 2, 5, 3 | domnmuln0 20808 | . 2 ⊢ ((𝑅 ∈ Domn ∧ (𝑦 ∈ 𝐵 ∧ 𝑦 ≠ 0 ) ∧ (𝑧 ∈ 𝐵 ∧ 𝑧 ≠ 0 )) → (𝑦(.r‘𝑅)𝑧) ≠ 0 ) |
| 8 | 1, 2, 3, 4, 5, 6, 7 | abvtrivd 20935 | 1 ⊢ (𝑅 ∈ Domn → 𝐹 ∈ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1570 ∈ wcel 2143 ifcif 4487 ↦ cmpt 5192 ‘cfv 6536 0cc0 11095 1c1 11096 Basecbs 17264 .rcmulr 17306 0gc0g 17487 Domncdomn 20791 AbsValcabv 20911 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11151 ax-resscn 11152 ax-1cn 11153 ax-icn 11154 ax-addcl 11155 ax-addrcl 11156 ax-mulcl 11157 ax-mulrcl 11158 ax-mulcom 11159 ax-addass 11160 ax-mulass 11161 ax-distr 11162 ax-i2m1 11163 ax-1ne0 11164 ax-1rid 11165 ax-rnegex 11166 ax-rrecex 11167 ax-cnre 11168 ax-pre-lttri 11169 ax-pre-lttrn 11170 ax-pre-ltadd 11171 ax-pre-mulgt0 11172 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-er 8690 df-map 8822 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11240 df-mnf 11241 df-xr 11242 df-ltxr 11243 df-le 11244 df-sub 11438 df-neg 11439 df-nn 12229 df-2 12298 df-ico 13373 df-sets 17219 df-slot 17237 df-ndx 17249 df-base 17265 df-plusg 17318 df-0g 17489 df-mgm 18693 df-sgrp 18772 df-mnd 18788 df-grp 18998 df-minusg 18999 df-cmn 19847 df-abl 19848 df-mgp 20212 df-rng 20226 df-ur 20259 df-ring 20312 df-nzr 20610 df-domn 20794 df-abv 20912 |
| This theorem is referenced by: abvtriv 20937 abvn0b 20939 fiabv 43304 |
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