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Theorem xpeq12d 4313
Description: Equality deduction for cross product. (Contributed by NM, 8-Dec-2013.)
Hypotheses
Ref Expression
xpeq1d.1 (φA = B)
xpeq12d.2 (φ𝐶 = 𝐷)
Assertion
Ref Expression
xpeq12d (φ → (A × 𝐶) = (B × 𝐷))

Proof of Theorem xpeq12d
StepHypRef Expression
1 xpeq1d.1 . 2 (φA = B)
2 xpeq12d.2 . 2 (φ𝐶 = 𝐷)
3 xpeq12 4307 . 2 ((A = B 𝐶 = 𝐷) → (A × 𝐶) = (B × 𝐷))
41, 2, 3syl2anc 391 1 (φ → (A × 𝐶) = (B × 𝐷))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1242   × cxp 4286
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-5 1333  ax-7 1334  ax-gen 1335  ax-ie1 1379  ax-ie2 1380  ax-8 1392  ax-11 1394  ax-4 1397  ax-17 1416  ax-i9 1420  ax-ial 1424  ax-i5r 1425  ax-ext 2019
This theorem depends on definitions:  df-bi 110  df-tru 1245  df-nf 1347  df-sb 1643  df-clab 2024  df-cleq 2030  df-clel 2033  df-opab 3810  df-xp 4294
This theorem is referenced by:  opeliunxp  4338  mpt2mptsx  5765  dmmpt2ssx  5767  fmpt2x  5768  erssxp  6065
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