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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 4891 |
. 2
| |
| 4 | 1, 2, 3 | mp2an 430 |
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-14 2212 ax-ext 2220 ax-sep 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-opab 4194 df-xp 4782 |
| This theorem is used by: oprabex 6365 oprabex3 6366 mpoexw 6453 fnpm 6935 mapsnf1o2 6984 xpsnen 7125 endisj 7128 xpcomen 7131 xpassen 7134 xpmapenlem 7155 0ct 7453 exmidomni 7488 exmidfodomrlemim 7559 2omotaplemst 7630 enqex 7733 nqex 7736 enq0ex 7812 nq0ex 7813 npex 7846 enrex 8110 addvalex 8217 axcnex 8232 addex 10068 mulex 10069 ixxex 10317 fxnn0nninf 10896 inftonninf 10899 shftfval 11607 nninfct 12842 qnumval 12989 qdenval 12990 qnnen 13379 prdsex 14278 metuex 15000 cnfldstr 15003 cnfldle 15012 znval 15079 znle 15080 znbaslemnn 15082 fnpsr 15161 txuni2 15499 txbas 15501 eltx 15502 txcnp 15514 txcnmpt 15516 txrest 15519 txlm 15522 reldvg 15922 pellexlem3 16248 |
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