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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 5111 | . 2 ⊢ (𝑥 = 𝐴 → (𝑦𝑅𝑥 ↔ 𝑦𝑅𝐴)) | |
| 2 | breq1 5110 | . 2 ⊢ (𝑦 = 𝐵 → (𝑦𝑅𝐴 ↔ 𝐵𝑅𝐴)) | |
| 3 | df-cnv 5667 | . 2 ⊢ ◡𝑅 = {〈𝑥, 𝑦〉 ∣ 𝑦𝑅𝑥} | |
| 4 | 1, 2, 3 | brabg 5522 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴◡𝑅𝐵 ↔ 𝐵𝑅𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∈ wcel 2145 class class class wbr 5107 ◡ccnv 5658 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2734 ax-sep 5255 ax-pr 5402 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2741 df-cleq 2754 df-clel 2837 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-br 5108 df-opab 5172 df-cnv 5667 |
| This theorem is used by: opelcnvg 5864 brcnv 5866 brelrng 5929 elinisegg 6093 relbrcnvg 6105 brcodir 6117 predep 6332 dffv2 6977 ersym 8712 brdifun 8730 eqinf 9458 inflb 9463 infglb 9464 infglbb 9465 infltoreq 9477 infempty 9482 brcnvtrclfv 15076 oduleg 18380 posglbdg 18503 znleval 21766 lenlts 27984 tgelrnpln 29129 brbtwn 29340 fcoinvbr 33063 cnvordtrestixx 34408 xrge0iifiso 34430 orvcgteel 34964 fv1stcnv 36341 fv2ndcnv 36342 wsuclem 36387 wsuclb 36390 colineardim1 36626 eldmcnv 39078 ineccnvmo 39090 alrmomorn 39091 brcnvin 39111 brxrn 39116 dfcoss3 39237 cosscnv 39239 brcoss3 39256 brcosscnv 39295 cosscnvssid3 39299 cosscnvssid4 39300 brnonrel 44414 ntrneifv2 44905 glbprlem 49876 gte-lte 50635 gt-lt 50636 |
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