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| Description: The domain of a square cross product. |
| Ref | Expression |
|---|---|
| dmxpid |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dm0 3330 |
. . 3
| |
| 2 | xpeq1 3207 |
. . . . 5
| |
| 3 | xp0r 3246 |
. . . . 5
| |
| 4 | 2, 3 | syl6eq 1526 |
. . . 4
|
| 5 | 4 | dmeqd 3320 |
. . 3
|
| 6 | id 59 |
. . 3
| |
| 7 | 1, 5, 6 | 3eqtr4a 1535 |
. 2
|
| 8 | dmxp 3339 |
. 2
| |
| 9 | 7, 8 | pm2.61ine 1637 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: dmxpin 3341 xpid11 3342 ecopoprdm 4316 ismet 7802 dfms2 7803 ismeti 7806 metreslem 7826 cnmetba 7907 cncfmet 7909 remetba 7913 xplmi 7977 xplmi2 7978 xplm 7979 xpcn 7980 oprcn 7981 bopcnlem3 7987 bopcn 7989 grprndm 8058 vcoprne 8201 imsba 8324 dfhnorm2 8990 hhshsslem1 9139 dmhmph 10526 reldded 10653 reldcat 10674 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-9 967 ax-10 968 ax-11 969 ax-12 970 ax-13 971 ax-14 972 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 ax-sep 2709 ax-pow 2749 ax-pr 2786 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 983 df-sb 1174 df-eu 1384 df-mo 1385 df-clab 1467 df-cleq 1472 df-clel 1475 df-ne 1590 df-ral 1652 df-v 1815 df-dif 2053 df-un 2054 df-in 2055 df-ss 2057 df-nul 2285 df-pw 2407 df-sn 2417 df-pr 2418 df-op 2421 df-br 2626 df-opab 2673 df-xp 3191 df-dm 3195 |