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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 21102 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 20974 | . 2 ⊢ (𝑅 ∈ Domn → 𝑅 ∈ Ring) | |
| 7 | 2, 5, 3 | domnmuln0 20976 | . 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 21104 | 1 ⊢ (𝑅 ∈ Domn → 𝐹 ∈ 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2146 ifcif 4485 ↦ cmpt 5189 ‘cfv 6547 0cc0 11213 1c1 11214 Basecbs 17402 .rcmulr 17444 0gc0g 17625 Domncdomn 20959 AbsValcabv 21080 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7761 ax-cnex 11269 ax-resscn 11270 ax-1cn 11271 ax-icn 11272 ax-addcl 11273 ax-addrcl 11274 ax-mulcl 11275 ax-mulrcl 11276 ax-mulcom 11277 ax-addass 11278 ax-mulass 11279 ax-distr 11280 ax-i2m1 11281 ax-1ne0 11282 ax-1rid 11283 ax-rnegex 11284 ax-rrecex 11285 ax-cnre 11286 ax-pre-lttri 11287 ax-pre-lttrn 11288 ax-pre-ltadd 11289 ax-pre-mulgt0 11290 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6311 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-riota 7387 df-ov 7433 df-oprab 7434 df-mpo 7435 df-om 7888 df-2nd 8012 df-frecs 8313 df-wrecs 8344 df-recs 8393 df-rdg 8432 df-er 8731 df-map 8863 df-en 8988 df-dom 8989 df-sdom 8990 df-pnf 11358 df-mnf 11359 df-xr 11360 df-ltxr 11361 df-le 11362 df-sub 11556 df-neg 11557 df-nn 12349 df-2 12418 df-ico 13495 df-sets 17357 df-slot 17375 df-ndx 17387 df-base 17403 df-plusg 17456 df-0g 17627 df-mgm 18831 df-sgrp 18923 df-mnd 18939 df-grp 19162 df-minusg 19163 df-cmn 20011 df-abl 20012 df-mgp 20376 df-rng 20390 df-ur 20423 df-ring 20476 df-nzr 20778 df-domn 20962 df-abv 21081 |
| This theorem is used by: abvtriv 21106 abvn0b 21108 fiabv 43743 |
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