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| Mirrors > Home > ILE Home > Th. List > relxp | GIF version | ||
| Description: A cross product is a relation. Theorem 3.13(i) of [Monk1] p. 37. (Contributed by NM, 2-Aug-1994.) |
| Ref | Expression |
|---|---|
| relxp | ⊢ Rel (𝐴 × 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpss 4881 | . 2 ⊢ (𝐴 × 𝐵) ⊆ (V × V) | |
| 2 | df-rel 4779 | . 2 ⊢ (Rel (𝐴 × 𝐵) ↔ (𝐴 × 𝐵) ⊆ (V × V)) | |
| 3 | 1, 2 | mpbir 146 | 1 ⊢ Rel (𝐴 × 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: Vcvv 2821 ⊆ wss 3220 × cxp 4770 Rel wrel 4777 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This theorem depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-in 3226 df-ss 3233 df-opab 4191 df-xp 4778 df-rel 4779 |
| This theorem is referenced by: xpiindim 4915 eliunxp 4917 opeliunxp2 4918 relres 5089 restidsing 5117 codir 5174 qfto 5175 cnvcnv 5238 dfco2 5285 unixpm 5321 ressn 5326 fliftcnv 5995 fliftfun 5996 opeliunxp2f 6503 reltpos 6515 tpostpos 6529 tposfo 6536 tposf 6537 swoer 6829 xpider 6874 erinxp 6877 xpcomf1o 7117 ltrel 8381 lerel 8383 fisumcom2 12188 fprodcom2fi 12376 txuni2 15340 txdis1cn 15362 xmeter 15520 reldvg 15763 lgsquadlem1 16179 lgsquadlem2 16180 |
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