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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 4846 |
. 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-rex 2517 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-opab 4156 df-xp 4737 |
| This theorem is referenced by: oprabex 6299 oprabex3 6300 mpoexw 6387 fnpm 6868 mapsnf1o2 6908 xpsnen 7048 endisj 7051 xpcomen 7054 xpassen 7057 xpmapenlem 7078 0ct 7349 exmidomni 7384 exmidfodomrlemim 7455 2omotaplemst 7520 enqex 7623 nqex 7626 enq0ex 7702 nq0ex 7703 npex 7736 enrex 8000 addvalex 8107 axcnex 8122 addex 9930 mulex 9931 ixxex 10178 fxnn0nninf 10747 inftonninf 10750 shftfval 11444 nninfct 12675 qnumval 12820 qdenval 12821 qnnen 13115 prdsex 13415 metuex 14634 cnfldstr 14637 cnfldle 14646 znval 14715 znle 14716 znbaslemnn 14718 fnpsr 14746 txuni2 15050 txbas 15052 eltx 15053 txcnp 15065 txcnmpt 15067 txrest 15070 txlm 15073 reldvg 15473 pellexlem3 15776 |
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