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Mirrors > Home > MPE Home > Th. List > Mathboxes > frege83 | Structured version Visualization version GIF version |
Description: Apply commuted form of frege81 41534 when the property 𝑅 is hereditary in a disjunction of two properties, only one of which is known to be held by 𝑋. Proposition 83 of [Frege1879] p. 65. Here we introduce the union of classes where Frege has a disjunction of properties which are represented by membership in either of the classes. (Contributed by RP, 1-Jul-2020.) (Revised by RP, 5-Jul-2020.) (Proof modification is discouraged.) |
Ref | Expression |
---|---|
frege83.x | ⊢ 𝑋 ∈ 𝑆 |
frege83.y | ⊢ 𝑌 ∈ 𝑇 |
frege83.r | ⊢ 𝑅 ∈ 𝑈 |
frege83.b | ⊢ 𝐵 ∈ 𝑉 |
frege83.c | ⊢ 𝐶 ∈ 𝑊 |
Ref | Expression |
---|---|
frege83 | ⊢ (𝑅 hereditary (𝐵 ∪ 𝐶) → (𝑋 ∈ 𝐵 → (𝑋(t+‘𝑅)𝑌 → 𝑌 ∈ (𝐵 ∪ 𝐶)))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | frege36 41429 | . . 3 ⊢ (𝑋 ∈ 𝐵 → (¬ 𝑋 ∈ 𝐵 → 𝑋 ∈ 𝐶)) | |
2 | elun 4088 | . . . 4 ⊢ (𝑋 ∈ (𝐵 ∪ 𝐶) ↔ (𝑋 ∈ 𝐵 ∨ 𝑋 ∈ 𝐶)) | |
3 | df-or 845 | . . . 4 ⊢ ((𝑋 ∈ 𝐵 ∨ 𝑋 ∈ 𝐶) ↔ (¬ 𝑋 ∈ 𝐵 → 𝑋 ∈ 𝐶)) | |
4 | 2, 3 | bitri 274 | . . 3 ⊢ (𝑋 ∈ (𝐵 ∪ 𝐶) ↔ (¬ 𝑋 ∈ 𝐵 → 𝑋 ∈ 𝐶)) |
5 | 1, 4 | sylibr 233 | . 2 ⊢ (𝑋 ∈ 𝐵 → 𝑋 ∈ (𝐵 ∪ 𝐶)) |
6 | frege83.x | . . 3 ⊢ 𝑋 ∈ 𝑆 | |
7 | frege83.y | . . 3 ⊢ 𝑌 ∈ 𝑇 | |
8 | frege83.r | . . 3 ⊢ 𝑅 ∈ 𝑈 | |
9 | frege83.b | . . . . 5 ⊢ 𝐵 ∈ 𝑉 | |
10 | 9 | elexi 3450 | . . . 4 ⊢ 𝐵 ∈ V |
11 | frege83.c | . . . . 5 ⊢ 𝐶 ∈ 𝑊 | |
12 | 11 | elexi 3450 | . . . 4 ⊢ 𝐶 ∈ V |
13 | 10, 12 | unex 7591 | . . 3 ⊢ (𝐵 ∪ 𝐶) ∈ V |
14 | 6, 7, 8, 13 | frege82 41535 | . 2 ⊢ ((𝑋 ∈ 𝐵 → 𝑋 ∈ (𝐵 ∪ 𝐶)) → (𝑅 hereditary (𝐵 ∪ 𝐶) → (𝑋 ∈ 𝐵 → (𝑋(t+‘𝑅)𝑌 → 𝑌 ∈ (𝐵 ∪ 𝐶))))) |
15 | 5, 14 | ax-mp 5 | 1 ⊢ (𝑅 hereditary (𝐵 ∪ 𝐶) → (𝑋 ∈ 𝐵 → (𝑋(t+‘𝑅)𝑌 → 𝑌 ∈ (𝐵 ∪ 𝐶)))) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∨ wo 844 ∈ wcel 2110 Vcvv 3431 ∪ cun 3890 class class class wbr 5079 ‘cfv 6432 t+ctcl 14707 hereditary whe 41362 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2015 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2711 ax-rep 5214 ax-sep 5227 ax-nul 5234 ax-pow 5292 ax-pr 5356 ax-un 7583 ax-cnex 10938 ax-resscn 10939 ax-1cn 10940 ax-icn 10941 ax-addcl 10942 ax-addrcl 10943 ax-mulcl 10944 ax-mulrcl 10945 ax-mulcom 10946 ax-addass 10947 ax-mulass 10948 ax-distr 10949 ax-i2m1 10950 ax-1ne0 10951 ax-1rid 10952 ax-rnegex 10953 ax-rrecex 10954 ax-cnre 10955 ax-pre-lttri 10956 ax-pre-lttrn 10957 ax-pre-ltadd 10958 ax-pre-mulgt0 10959 ax-frege1 41380 ax-frege2 41381 ax-frege8 41399 ax-frege28 41420 ax-frege31 41424 ax-frege52a 41447 ax-frege58b 41491 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-ifp 1061 df-3or 1087 df-3an 1088 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2072 df-mo 2542 df-eu 2571 df-clab 2718 df-cleq 2732 df-clel 2818 df-nfc 2891 df-ne 2946 df-nel 3052 df-ral 3071 df-rex 3072 df-reu 3073 df-rab 3075 df-v 3433 df-sbc 3721 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4846 df-int 4886 df-iun 4932 df-br 5080 df-opab 5142 df-mpt 5163 df-tr 5197 df-id 5490 df-eprel 5496 df-po 5504 df-so 5505 df-fr 5545 df-we 5547 df-xp 5596 df-rel 5597 df-cnv 5598 df-co 5599 df-dm 5600 df-rn 5601 df-res 5602 df-ima 5603 df-pred 6201 df-ord 6268 df-on 6269 df-lim 6270 df-suc 6271 df-iota 6390 df-fun 6434 df-fn 6435 df-f 6436 df-f1 6437 df-fo 6438 df-f1o 6439 df-fv 6440 df-riota 7229 df-ov 7275 df-oprab 7276 df-mpo 7277 df-om 7708 df-2nd 7826 df-frecs 8089 df-wrecs 8120 df-recs 8194 df-rdg 8233 df-er 8490 df-en 8726 df-dom 8727 df-sdom 8728 df-pnf 11022 df-mnf 11023 df-xr 11024 df-ltxr 11025 df-le 11026 df-sub 11218 df-neg 11219 df-nn 11985 df-2 12047 df-n0 12245 df-z 12331 df-uz 12594 df-seq 13733 df-trcl 14709 df-relexp 14742 df-he 41363 |
This theorem is referenced by: frege133 41586 |
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