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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 4889 |
. 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 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 |
| 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 4193 df-xp 4780 |
| This theorem is used by: oprabex 6361 oprabex3 6362 mpoexw 6449 fnpm 6930 mapsnf1o2 6978 xpsnen 7119 endisj 7122 xpcomen 7125 xpassen 7128 xpmapenlem 7149 0ct 7448 exmidomni 7483 exmidfodomrlemim 7554 2omotaplemst 7625 enqex 7728 nqex 7731 enq0ex 7807 nq0ex 7808 npex 7841 enrex 8105 addvalex 8212 axcnex 8227 addex 10063 mulex 10064 ixxex 10312 fxnn0nninf 10891 inftonninf 10894 shftfval 11602 nninfct 12837 qnumval 12984 qdenval 12985 qnnen 13374 prdsex 14256 metuex 14976 cnfldstr 14979 cnfldle 14988 znval 15055 znle 15056 znbaslemnn 15058 fnpsr 15135 txuni2 15448 txbas 15450 eltx 15451 txcnp 15463 txcnmpt 15465 txrest 15468 txlm 15471 reldvg 15871 pellexlem3 16192 |
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