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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 4834 | . 2 ⊢ (𝐴 × 𝐵) ⊆ (V × V) | |
| 2 | df-rel 4732 | . 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 2802 ⊆ wss 3200 × cxp 4723 Rel wrel 4730 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-v 2804 df-in 3206 df-ss 3213 df-opab 4151 df-xp 4731 df-rel 4732 |
| This theorem is referenced by: xpiindim 4867 eliunxp 4869 opeliunxp2 4870 relres 5041 restidsing 5069 codir 5125 qfto 5126 cnvcnv 5189 dfco2 5236 unixpm 5272 ressn 5277 fliftcnv 5936 fliftfun 5937 opeliunxp2f 6404 reltpos 6416 tpostpos 6430 tposfo 6437 tposf 6438 swoer 6730 xpider 6775 erinxp 6778 xpcomf1o 7009 ltrel 8241 lerel 8243 fisumcom2 12004 fprodcom2fi 12192 txuni2 14986 txdis1cn 15008 xmeter 15166 reldvg 15409 lgsquadlem1 15812 lgsquadlem2 15813 |
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