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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 4884 |
. 2
| |
| 4 | 1, 2, 3 | mp2an 430 |
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 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 4244 ax-pow 4306 ax-pr 4341 ax-un 4573 |
| This theorem 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 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-opab 4188 df-xp 4775 |
| This theorem is referenced by: oprabex 6351 oprabex3 6352 mpoexw 6439 fnpm 6920 mapsnf1o2 6968 xpsnen 7109 endisj 7112 xpcomen 7115 xpassen 7118 xpmapenlem 7139 0ct 7437 exmidomni 7472 exmidfodomrlemim 7543 2omotaplemst 7614 enqex 7717 nqex 7720 enq0ex 7796 nq0ex 7797 npex 7830 enrex 8094 addvalex 8201 axcnex 8216 addex 10031 mulex 10032 ixxex 10280 fxnn0nninf 10854 inftonninf 10857 shftfval 11564 nninfct 12796 qnumval 12941 qdenval 12942 qnnen 13300 prdsex 14149 metuex 14864 cnfldstr 14867 cnfldle 14876 znval 14943 znle 14944 znbaslemnn 14946 fnpsr 14974 txuni2 15280 txbas 15282 eltx 15283 txcnp 15295 txcnmpt 15297 txrest 15300 txlm 15303 reldvg 15703 pellexlem3 16007 |
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