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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 4864 |
. 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 2205 ax-14 2206 ax-ext 2214 ax-sep 4228 ax-pow 4287 ax-pr 4322 ax-un 4554 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-rex 2526 df-v 2815 df-un 3215 df-in 3217 df-ss 3224 df-pw 3671 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-opab 4172 df-xp 4755 |
| This theorem is referenced by: oprabex 6321 oprabex3 6322 mpoexw 6409 fnpm 6890 mapsnf1o2 6931 xpsnen 7072 endisj 7075 xpcomen 7078 xpassen 7081 xpmapenlem 7102 0ct 7398 exmidomni 7433 exmidfodomrlemim 7504 2omotaplemst 7572 enqex 7675 nqex 7678 enq0ex 7754 nq0ex 7755 npex 7788 enrex 8052 addvalex 8159 axcnex 8174 addex 9984 mulex 9985 ixxex 10232 fxnn0nninf 10801 inftonninf 10804 shftfval 11506 nninfct 12737 qnumval 12882 qdenval 12883 qnnen 13182 prdsex 13482 metuex 14703 cnfldstr 14706 cnfldle 14715 znval 14784 znle 14785 znbaslemnn 14787 fnpsr 14815 txuni2 15121 txbas 15123 eltx 15124 txcnp 15136 txcnmpt 15138 txrest 15141 txlm 15144 reldvg 15544 pellexlem3 15847 |
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