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Mirrors > Home > MPE Home > Th. List > domtr | Structured version Visualization version GIF version |
Description: Transitivity of dominance relation. Theorem 17 of [Suppes] p. 94. (Contributed by NM, 4-Jun-1998.) (Revised by Mario Carneiro, 15-Nov-2014.) |
Ref | Expression |
---|---|
domtr | ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐵 ≼ 𝐶) → 𝐴 ≼ 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | reldom 7961 | . 2 ⊢ Rel ≼ | |
2 | vex 3203 | . . . 4 ⊢ 𝑦 ∈ V | |
3 | 2 | brdom 7967 | . . 3 ⊢ (𝑥 ≼ 𝑦 ↔ ∃𝑔 𝑔:𝑥–1-1→𝑦) |
4 | vex 3203 | . . . 4 ⊢ 𝑧 ∈ V | |
5 | 4 | brdom 7967 | . . 3 ⊢ (𝑦 ≼ 𝑧 ↔ ∃𝑓 𝑓:𝑦–1-1→𝑧) |
6 | eeanv 2182 | . . . 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)) | |
7 | f1co 6110 | . . . . . . . 8 ⊢ ((𝑓:𝑦–1-1→𝑧 ∧ 𝑔:𝑥–1-1→𝑦) → (𝑓 ∘ 𝑔):𝑥–1-1→𝑧) | |
8 | 7 | ancoms 469 | . . . . . . 7 ⊢ ((𝑔:𝑥–1-1→𝑦 ∧ 𝑓:𝑦–1-1→𝑧) → (𝑓 ∘ 𝑔):𝑥–1-1→𝑧) |
9 | vex 3203 | . . . . . . . . 9 ⊢ 𝑓 ∈ V | |
10 | vex 3203 | . . . . . . . . 9 ⊢ 𝑔 ∈ V | |
11 | 9, 10 | coex 7118 | . . . . . . . 8 ⊢ (𝑓 ∘ 𝑔) ∈ V |
12 | f1eq1 6096 | . . . . . . . 8 ⊢ (ℎ = (𝑓 ∘ 𝑔) → (ℎ:𝑥–1-1→𝑧 ↔ (𝑓 ∘ 𝑔):𝑥–1-1→𝑧)) | |
13 | 11, 12 | spcev 3300 | . . . . . . 7 ⊢ ((𝑓 ∘ 𝑔):𝑥–1-1→𝑧 → ∃ℎ ℎ:𝑥–1-1→𝑧) |
14 | 8, 13 | syl 17 | . . . . . 6 ⊢ ((𝑔:𝑥–1-1→𝑦 ∧ 𝑓:𝑦–1-1→𝑧) → ∃ℎ ℎ:𝑥–1-1→𝑧) |
15 | 4 | brdom 7967 | . . . . . 6 ⊢ (𝑥 ≼ 𝑧 ↔ ∃ℎ ℎ:𝑥–1-1→𝑧) |
16 | 14, 15 | sylibr 224 | . . . . 5 ⊢ ((𝑔:𝑥–1-1→𝑦 ∧ 𝑓:𝑦–1-1→𝑧) → 𝑥 ≼ 𝑧) |
17 | 16 | exlimivv 1860 | . . . 4 ⊢ (∃𝑔∃𝑓(𝑔:𝑥–1-1→𝑦 ∧ 𝑓:𝑦–1-1→𝑧) → 𝑥 ≼ 𝑧) |
18 | 6, 17 | sylbir 225 | . . 3 ⊢ ((∃𝑔 𝑔:𝑥–1-1→𝑦 ∧ ∃𝑓 𝑓:𝑦–1-1→𝑧) → 𝑥 ≼ 𝑧) |
19 | 3, 5, 18 | syl2anb 496 | . 2 ⊢ ((𝑥 ≼ 𝑦 ∧ 𝑦 ≼ 𝑧) → 𝑥 ≼ 𝑧) |
20 | 1, 19 | vtoclr 5164 | 1 ⊢ ((𝐴 ≼ 𝐵 ∧ 𝐵 ≼ 𝐶) → 𝐴 ≼ 𝐶) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 384 ∃wex 1704 class class class wbr 4653 ∘ ccom 5118 –1-1→wf1 5885 ≼ cdom 7953 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-dom 7957 |
This theorem is referenced by: endomtr 8014 domentr 8015 cnvct 8033 ssct 8041 undom 8048 sdomdomtr 8093 domsdomtr 8095 xpen 8123 unxpdom2 8168 sucxpdom 8169 fidomdm 8243 hartogs 8449 harword 8470 unxpwdom 8494 harcard 8804 infxpenlem 8836 xpct 8839 indcardi 8864 fodomfi2 8883 infpwfien 8885 inffien 8886 cdadom3 9010 cdainf 9014 infcda1 9015 cdalepw 9018 unctb 9027 infcdaabs 9028 infcda 9030 infdif 9031 infdif2 9032 infxp 9037 infmap2 9040 fictb 9067 cfslb2n 9090 isfin32i 9187 fin1a2lem12 9233 hsmexlem1 9248 dmct 9346 brdom3 9350 brdom5 9351 brdom4 9352 imadomg 9356 fimact 9357 fnct 9359 mptct 9360 iundomg 9363 uniimadom 9366 ondomon 9385 unirnfdomd 9389 alephval2 9394 iunctb 9396 alephexp1 9401 alephreg 9404 cfpwsdom 9406 gchdomtri 9451 canthnum 9471 canthp1lem1 9474 canthp1 9476 pwfseqlem5 9485 pwxpndom2 9487 pwxpndom 9488 pwcdandom 9489 gchcdaidm 9490 gchxpidm 9491 gchpwdom 9492 gchaclem 9500 gchhar 9501 inar1 9597 rankcf 9599 grudomon 9639 grothac 9652 rpnnen 14956 cctop 20810 1stcfb 21248 2ndcredom 21253 2ndc1stc 21254 1stcrestlem 21255 2ndcctbss 21258 2ndcdisj2 21260 2ndcomap 21261 2ndcsep 21262 dis2ndc 21263 hauspwdom 21304 tx1stc 21453 tx2ndc 21454 met2ndci 22327 opnreen 22634 rectbntr0 22635 uniiccdif 23346 dyadmbl 23368 opnmblALT 23371 mbfimaopnlem 23422 abrexdomjm 29345 mptctf 29495 locfinreflem 29907 sigaclci 30195 omsmeas 30385 sibfof 30402 abrexdom 33525 heiborlem3 33612 ttac 37603 idomsubgmo 37776 uzct 39232 omeiunle 40731 smfaddlem2 40972 smflimlem6 40984 smfmullem4 41001 smfpimbor1lem1 41005 |
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