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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 5110 | . 2 ⊢ (𝑥 = 𝐴 → (𝑦𝑅𝑥 ↔ 𝑦𝑅𝐴)) | |
| 2 | breq1 5109 | . 2 ⊢ (𝑦 = 𝐵 → (𝑦𝑅𝐴 ↔ 𝐵𝑅𝐴)) | |
| 3 | df-cnv 5663 | . 2 ⊢ ◡𝑅 = {〈𝑥, 𝑦〉 ∣ 𝑦𝑅𝑥} | |
| 4 | 1, 2, 3 | brabg 5518 | 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 2147 class class class wbr 5106 ◡ccnv 5654 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5252 ax-pr 5395 |
| 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 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-br 5107 df-opab 5171 df-cnv 5663 |
| This theorem is used by: opelcnvg 5864 brcnv 5866 brelrng 5929 elinisegg 6102 relbrcnvg 6112 brcodir 6124 predep 6348 dffv2 7000 ersym 8755 brdifun 8773 eqinf 9501 inflb 9506 infglb 9507 infglbb 9508 infltoreq 9520 infempty 9525 brcnvtrclfv 15182 oduleg 18490 posglbdg 18613 znleval 21887 lenlts 28136 tgelrnpln 29281 brbtwn 29504 fcoinvbr 33268 cnvordtrestixx 34612 xrge0iifiso 34634 orvcgteel 35167 fv1stcnv 36718 fv2ndcnv 36719 wsuclem 36764 wsuclb 36767 colineardim1 37003 eldmcnv 39468 ineccnvmo 39480 alrmomorn 39481 brcnvin 39501 brxrn 39506 dfcoss3 39627 cosscnv 39629 brcoss3 39646 brcosscnv 39685 cosscnvssid3 39689 cosscnvssid4 39690 brnonrel 44779 ntrneifv2 45270 glbprlem 50282 gte-lte 51095 gt-lt 51096 |
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