Theorem dmxpin 3331

Description: The domain of the intersection of two square cross products. Unlike dmin 3315, equality holds.

Assertion

Ref	Expression
dmxpin	|- dom ((A X. A) i^i (B X. B)) = (A i^i B)

Proof of Theorem dmxpin

Step	Hyp	Ref	Expression
1		inxp 3266	. . 3 |- ((A X. A) i^i (B X. B)) = ((A i^i B) X. (A i^i B))
2	1	dmeqi 3309	. 2 |- dom ((A X. A) i^i (B X. B)) = dom ((A i^i B) X. (A i^i B))
3		dmxpid 3330	. 2 |- dom ((A i^i B) X. (A i^i B)) = (A i^i B)
4	2, 3	eqtr 1494	1 |- dom ((A X. A) i^i (B X. B)) = (A i^i B)

Syntax hints:   = wceq 955   i^i cin 2044   X. cxp 3165  dom cdm 3167

This theorem is referenced by:  metssba 7788

This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 961  ax-gen 962  ax-8 963  ax-9 964  ax-10 965  ax-11 966  ax-12 967  ax-13 968  ax-14 969  ax-17 970  ax-4 972  ax-5o 974  ax-6o 977  ax-9o 1122  ax-10o 1139  ax-16 1210  ax-11o 1218  ax-ext 1459  ax-sep 2700  ax-pow 2739  ax-pr 2776

This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-ex 980  df-sb 1172  df-eu 1382  df-mo 1383  df-clab 1464  df-cleq 1469  df-clel 1472  df-ne 1586  df-ral 1648  df-v 1810  df-dif 2047  df-un 2048  df-in 2049  df-ss 2051  df-nul 2279  df-pw 2400  df-sn 2410  df-pr 2411  df-op 2414  df-br 2617  df-opab 2664  df-xp 3181  df-rel 3182  df-dm 3185

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