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Theorem gbpart7 48201
Description: The (weak) Goldbach partition of 7. (Contributed by AV, 20-Jul-2020.)
Assertion
Ref Expression
gbpart7 7 = ((2 + 2) + 3)

Proof of Theorem gbpart7
StepHypRef Expression
1 2p2e4 12276 . . 3 (2 + 2) = 4
21oveq1i 7368 . 2 ((2 + 2) + 3) = (4 + 3)
3 4p3e7 12295 . 2 (4 + 3) = 7
42, 3eqtr2i 2761 1 7 = ((2 + 2) + 3)
Colors of variables: wff setvar class
Syntax hints:   = wceq 1542  (class class class)co 7358   + caddc 11030  2c2 12201  3c3 12202  4c4 12203  7c7 12206
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2709  ax-1cn 11085  ax-addcl 11087  ax-addass 11092
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-rab 3391  df-v 3432  df-dif 3893  df-un 3895  df-ss 3907  df-nul 4275  df-if 4468  df-sn 4569  df-pr 4571  df-op 4575  df-uni 4852  df-br 5087  df-iota 6446  df-fv 6498  df-ov 7361  df-2 12209  df-3 12210  df-4 12211  df-5 12212  df-6 12213  df-7 12214
This theorem is referenced by:  7gbow  48206
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