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Mirrors > Home > MPE Home > Th. List > tcwf | Structured version Visualization version GIF version |
Description: The transitive closure function is well-founded if its argument is. (Contributed by Mario Carneiro, 23-Jun-2013.) |
Ref | Expression |
---|---|
tcwf | ⊢ (𝐴 ∈ ∪ (𝑅1 “ On) → (TC‘𝐴) ∈ ∪ (𝑅1 “ On)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | r1elssi 9564 | . . 3 ⊢ (𝐴 ∈ ∪ (𝑅1 “ On) → 𝐴 ⊆ ∪ (𝑅1 “ On)) | |
2 | dftr3 5200 | . . . . 5 ⊢ (Tr ∪ (𝑅1 “ On) ↔ ∀𝑥 ∈ ∪ (𝑅1 “ On)𝑥 ⊆ ∪ (𝑅1 “ On)) | |
3 | r1elssi 9564 | . . . . 5 ⊢ (𝑥 ∈ ∪ (𝑅1 “ On) → 𝑥 ⊆ ∪ (𝑅1 “ On)) | |
4 | 2, 3 | mprgbir 3081 | . . . 4 ⊢ Tr ∪ (𝑅1 “ On) |
5 | tcmin 9499 | . . . 4 ⊢ (𝐴 ∈ ∪ (𝑅1 “ On) → ((𝐴 ⊆ ∪ (𝑅1 “ On) ∧ Tr ∪ (𝑅1 “ On)) → (TC‘𝐴) ⊆ ∪ (𝑅1 “ On))) | |
6 | 4, 5 | mpan2i 694 | . . 3 ⊢ (𝐴 ∈ ∪ (𝑅1 “ On) → (𝐴 ⊆ ∪ (𝑅1 “ On) → (TC‘𝐴) ⊆ ∪ (𝑅1 “ On))) |
7 | 1, 6 | mpd 15 | . 2 ⊢ (𝐴 ∈ ∪ (𝑅1 “ On) → (TC‘𝐴) ⊆ ∪ (𝑅1 “ On)) |
8 | fvex 6784 | . . 3 ⊢ (TC‘𝐴) ∈ V | |
9 | 8 | r1elss 9565 | . 2 ⊢ ((TC‘𝐴) ∈ ∪ (𝑅1 “ On) ↔ (TC‘𝐴) ⊆ ∪ (𝑅1 “ On)) |
10 | 7, 9 | sylibr 233 | 1 ⊢ (𝐴 ∈ ∪ (𝑅1 “ On) → (TC‘𝐴) ∈ ∪ (𝑅1 “ On)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2110 ⊆ wss 3892 ∪ cuni 4845 Tr wtr 5196 “ cima 5593 Oncon0 6265 ‘cfv 6432 TCctc 9494 𝑅1cr1 9521 |
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 7582 ax-inf2 9377 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 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-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-ov 7274 df-om 7707 df-2nd 7825 df-frecs 8088 df-wrecs 8119 df-recs 8193 df-rdg 8232 df-tc 9495 df-r1 9523 |
This theorem is referenced by: tcrank 9643 |
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