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| Description: The domain of a square cross product. |
| Ref | Expression |
|---|---|
| dmxpid |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dm0 3323 |
. . 3
| |
| 2 | xpeq1 3200 |
. . . . 5
| |
| 3 | xp0r 3239 |
. . . . 5
| |
| 4 | 2, 3 | syl6eq 1523 |
. . . 4
|
| 5 | 4 | dmeqd 3313 |
. . 3
|
| 6 | id 59 |
. . 3
| |
| 7 | 1, 5, 6 | 3eqtr4a 1532 |
. 2
|
| 8 | dmxp 3332 |
. 2
| |
| 9 | 7, 8 | pm2.61ine 1634 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: dmxpin 3334 xpid11 3335 ecopoprdm 4309 ismet 7798 dfms2 7799 ismeti 7802 metreslem 7822 cnmetba 7903 cncfmet 7905 remetba 7909 xplmi 7973 xplmi2 7974 xplm 7975 xpcn 7976 oprcn 7977 bopcnlem3 7983 bopcn 7985 grprndm 8054 vcoprne 8198 imsba 8321 dfhnorm2 8988 hhshsslem1 9137 dmhmph 10532 reldded 10674 reldcat 10695 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-9 965 ax-10 966 ax-11 967 ax-12 968 ax-13 969 ax-14 970 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 ax-sep 2703 ax-pow 2742 ax-pr 2779 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 981 df-sb 1172 df-eu 1382 df-mo 1383 df-clab 1464 df-cleq 1469 df-clel 1472 df-ne 1587 df-ral 1649 df-v 1812 df-dif 2049 df-un 2050 df-in 2051 df-ss 2053 df-nul 2281 df-pw 2402 df-sn 2412 df-pr 2413 df-op 2416 df-br 2620 df-opab 2667 df-xp 3184 df-dm 3188 |