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| Mirrors > Home > ILE Home > Th. List > xpex | Unicode version | ||
| Description: The cross product of two sets is a set. Proposition 6.2 of [TakeutiZaring] p. 23. (Contributed by NM, 14-Aug-1994.) |
| Ref | Expression |
|---|---|
| xpex.1 |
|
| xpex.2 |
|
| Ref | Expression |
|---|---|
| xpex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpex.1 |
. 2
| |
| 2 | xpex.2 |
. 2
| |
| 3 | xpexg 4840 |
. 2
| |
| 4 | 1, 2, 3 | mp2an 426 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| 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-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-opab 4151 df-xp 4731 |
| This theorem is referenced by: oprabex 6289 oprabex3 6290 mpoexw 6377 fnpm 6824 mapsnf1o2 6864 xpsnen 7004 endisj 7007 xpcomen 7010 xpassen 7013 xpmapenlem 7034 0ct 7305 exmidomni 7340 exmidfodomrlemim 7411 2omotaplemst 7476 enqex 7579 nqex 7582 enq0ex 7658 nq0ex 7659 npex 7692 enrex 7956 addvalex 8063 axcnex 8078 addex 9885 mulex 9886 ixxex 10133 fxnn0nninf 10700 inftonninf 10703 shftfval 11381 nninfct 12611 qnumval 12756 qdenval 12757 qnnen 13051 prdsex 13351 metuex 14568 cnfldstr 14571 cnfldle 14580 znval 14649 znle 14650 znbaslemnn 14652 fnpsr 14680 txuni2 14979 txbas 14981 eltx 14982 txcnp 14994 txcnmpt 14996 txrest 14999 txlm 15002 reldvg 15402 |
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