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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 6934 mapsnf1o2 6982 xpsnen 7123 endisj 7126 xpcomen 7129 xpassen 7132 xpmapenlem 7153 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 10069 mulex 10070 ixxex 10318 fxnn0nninf 10897 inftonninf 10900 shftfval 11608 nninfct 12843 qnumval 12990 qdenval 12991 qnnen 13380 prdsex 14279 metuex 15001 cnfldstr 15004 cnfldle 15013 znval 15080 znle 15081 znbaslemnn 15083 fnpsr 15160 txuni2 15482 txbas 15484 eltx 15485 txcnp 15497 txcnmpt 15499 txrest 15502 txlm 15505 reldvg 15905 pellexlem3 16231 |
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