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Related theorems GIF version |
| Description: Transitivity of dominance relation. Theorem 17 of [Suppes] p. 94. |
| Ref | Expression |
|---|---|
| domtr | ⊢ ((A ≼ B ∧ B ≼ C) → A ≼ C) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | reldom 3278 | . 2 ⊢ Rel ≼ | |
| 2 | eeanv 980 | . . . 4 ⊢ (∃g∃f(g:x–1-1→y ∧ f:y–1-1→z) ↔ (∃g g:x–1-1→y ∧ ∃f f:y–1-1→z)) | |
| 3 | f1co 2783 | . . . . . . 7 ⊢ ((f:y–1-1→z ∧ g:x–1-1→y) → (f ∘ g):x–1-1→z) | |
| 4 | 3 | ancoms 334 | . . . . . 6 ⊢ ((g:x–1-1→y ∧ f:y–1-1→z) → (f ∘ g):x–1-1→z) |
| 5 | visset 1350 | . . . . . . 7 ⊢ x ∈ V | |
| 6 | 5 | f1dom 3302 | . . . . . 6 ⊢ ((f ∘ g):x–1-1→z → x ≼ z) |
| 7 | 4, 6 | syl 12 | . . . . 5 ⊢ ((g:x–1-1→y ∧ f:y–1-1→z) → x ≼ z) |
| 8 | 7 | 19.23aivv 953 | . . . 4 ⊢ (∃g∃f(g:x–1-1→y ∧ f:y–1-1→z) → x ≼ z) |
| 9 | 2, 8 | sylbir 176 | . . 3 ⊢ ((∃g g:x–1-1→y ∧ ∃f f:y–1-1→z) → x ≼ z) |
| 10 | visset 1350 | . . . 4 ⊢ y ∈ V | |
| 11 | 10 | brdom 3283 | . . 3 ⊢ (x ≼ y ↔ ∃g g:x–1-1→y) |
| 12 | visset 1350 | . . . 4 ⊢ z ∈ V | |
| 13 | 12 | brdom 3283 | . . 3 ⊢ (y ≼ z ↔ ∃f f:y–1-1→z) |
| 14 | 9, 11, 13 | syl2anb 350 | . 2 ⊢ ((x ≼ y ∧ y ≼ z) → x ≼ z) |
| 15 | domrefg 3297 | . . 3 ⊢ (x ∈ V → x ≼ x) | |
| 16 | 5, 15 | ax-mp 6 | . 2 ⊢ x ≼ x |
| 17 | 1, 14, 16 | vtoclrbr 2450 | 1 ⊢ ((A ≼ B ∧ B ≼ C) → A ≼ C) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∧ wa 196 ∃wex 678 ∈ wcel 1092 Vcvv 1348 class class class wbr 2054 ∘ ccom 2414 –1-1→wf1 2419 ≼ cdom 3272 |
| This theorem is referenced by: endomtr 3325 domentr 3326 undom 3342 sdomdomtr 3370 fodom 3613 imadomg 3616 sucdom 3648 unxpdomlem 3649 unxpdom2 3651 sucxpdom 3652 ondomon 3662 cdadom3 3729 cdainf 3731 infxpidmlem8 4940 infxpidmlem11 4943 infxpidmlem12 4944 infunabs 4946 infcdaabs 4947 infdif 4948 infmap1 4950 alephexp1 4954 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-un 1076 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 df-rex 1206 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-uni 1920 df-br 2063 df-opab 2098 df-id 2125 df-xp 2424 df-rel 2425 df-cnv 2426 df-co 2427 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fun 2432 df-fn 2433 df-f 2434 df-f1 2435 df-fo 2436 df-f1o 2437 df-en 3274 df-dom 3275 |