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Related theorems GIF version |
| Description: Dominance is a relation. |
| Ref | Expression |
|---|---|
| reldom | ⊢ Rel ≼ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relopab 3323 | . 2 ⊢ Rel {〈x, y〉∣∃f f:x–1-1→y} | |
| 2 | df-dom 4430 | . . 3 ⊢ ≼ = {〈x, y〉∣∃f f:x–1-1→y} | |
| 3 | 2 | releqi 3301 | . 2 ⊢ (Rel ≼ ↔ Rel {〈x, y〉∣∃f f:x–1-1→y}) |
| 4 | 1, 3 | mpbir 197 | 1 ⊢ Rel ≼ |
| Colors of variables: wff set class |
| Syntax hints: ∃wex 1021 {copab 2721 Rel wrel 3232 –1-1→wf1 3236 ≼ cdom 4426 |
| This theorem is referenced by: relsdom 4435 brdomg 4437 domtr 4476 xpdom2 4505 xpdom1 4506 sbth 4520 sbthcl 4522 fodomr 4546 infsdomnn 4596 alephsucdom 4945 unctb 7669 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1003 ax-gen 1004 ax-8 1005 ax-10 1007 ax-11 1008 ax-12 1009 ax-13 1010 ax-14 1011 ax-17 1012 ax-4 1014 ax-5o 1016 ax-6o 1019 ax-9o 1164 ax-10o 1182 ax-16 1252 ax-11o 1260 ax-ext 1504 ax-sep 2758 ax-pow 2798 ax-pr 2835 |
| This theorem depends on definitions: df-bi 154 df-or 231 df-an 232 df-ex 1022 df-sb 1214 df-eu 1424 df-mo 1425 df-clab 1510 df-cleq 1515 df-clel 1518 df-ne 1634 df-v 1859 df-dif 2100 df-un 2101 df-in 2102 df-ss 2104 df-nul 2332 df-pw 2454 df-sn 2464 df-pr 2465 df-op 2468 df-opab 2722 df-xp 3241 df-rel 3242 df-dom 4430 |