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| Mirrors > Home > MPE Home > Th. List > brcnvg | Structured version Visualization version GIF version | ||
| Description: The converse of a binary relation swaps arguments. Theorem 11 of [Suppes] p. 61. (Contributed by NM, 10-Oct-2005.) |
| Ref | Expression |
|---|---|
| brcnvg | ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴◡𝑅𝐵 ↔ 𝐵𝑅𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | breq2 5078 | . 2 ⊢ (𝑥 = 𝐴 → (𝑦𝑅𝑥 ↔ 𝑦𝑅𝐴)) | |
| 2 | breq1 5077 | . 2 ⊢ (𝑦 = 𝐵 → (𝑦𝑅𝐴 ↔ 𝐵𝑅𝐴)) | |
| 3 | df-cnv 5628 | . 2 ⊢ ◡𝑅 = {〈𝑥, 𝑦〉 ∣ 𝑦𝑅𝑥} | |
| 4 | 1, 2, 3 | brabg 5483 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴◡𝑅𝐵 ↔ 𝐵𝑅𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2114 class class class wbr 5074 ◡ccnv 5619 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2707 ax-sep 5220 ax-pr 5364 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2714 df-cleq 2727 df-clel 2810 df-rab 3388 df-v 3429 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-nul 4264 df-if 4457 df-sn 4558 df-pr 4560 df-op 4564 df-br 5075 df-opab 5137 df-cnv 5628 |
| This theorem is referenced by: opelcnvg 5824 brcnv 5826 brelrng 5885 elinisegg 6047 relbrcnvg 6059 brcodir 6071 predep 6283 dffv2 6924 ersym 8645 brdifun 8663 eqinf 9387 inflb 9392 infglb 9393 infglbb 9394 infltoreq 9406 infempty 9411 brcnvtrclfv 14954 oduleg 18245 posglbdg 18368 znleval 21523 lenlts 27704 brbtwn 28956 fcoinvbr 32663 cnvordtrestixx 34045 xrge0iifiso 34067 orvcgteel 34600 fv1stcnv 35947 fv2ndcnv 35948 wsuclem 35993 wsuclb 35996 colineardim1 36231 eldmcnv 38654 ineccnvmo 38666 alrmomorn 38667 brcnvin 38687 brxrn 38692 dfcoss3 38813 cosscnv 38815 brcoss3 38832 brcosscnv 38871 cosscnvssid3 38875 cosscnvssid4 38876 brnonrel 44004 ntrneifv2 44495 glbprlem 49428 gte-lte 50187 gt-lt 50188 |
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