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| Mirrors > Home > ILE Home > Th. List > relxp | Unicode 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 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpss 4885 |
. 2
| |
| 2 | df-rel 4783 |
. 2
| |
| 3 | 1, 2 | mpbir 146 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on 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 proof 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 4194 df-xp 4782 df-rel 4783 |
| This theorem is used by: xpiindim 4919 eliunxp 4921 opeliunxp2 4922 relres 5093 restidsing 5122 codir 5179 qfto 5180 cnvcnv 5243 dfco2 5290 unixpm 5326 ressn 5331 fliftcnv 6004 fliftfun 6005 opeliunxp2f 6514 reltpos 6526 tpostpos 6540 tposfo 6547 tposf 6548 swoer 6840 xpider 6885 erinxp 6888 xpcomf1o 7129 ltrel 8393 lerel 8395 fisumcom2 12229 fprodcom2fi 12417 gsum2d2fi 14273 gsumcom2fi 14274 txuni2 15499 txdis1cn 15521 xmeter 15679 reldvg 15922 lgsquadlem1 16418 lgsquadlem2 16419 |
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