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Theorem gbpart7 48592
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 12392 . . 3 (2 + 2) = 4
21oveq1i 7429 . 2 ((2 + 2) + 3) = (4 + 3)
3 4p3e7 12411 . 2 (4 + 3) = 7
42, 3eqtr2i 2789 1 7 = ((2 + 2) + 3)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   = wceq 1570  (class class class)co 7419   + caddc 11120  2c2 12312  3c3 12313  4c4 12314  7c7 12317
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2148  ax-9 2156  ax-ext 2737  ax-1cn 11175  ax-addcl 11177  ax-addass 11182
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2744  df-cleq 2757  df-clel 2840  df-rab 3419  df-v 3459  df-dif 3909  df-un 3911  df-ss 3923  df-nul 4287  df-if 4490  df-sn 4592  df-pr 4594  df-op 4598  df-uni 4875  df-br 5112  df-iota 6496  df-fv 6548  df-ov 7422  df-2 12320  df-3 12321  df-4 12322  df-5 12323  df-6 12324  df-7 12325
This theorem is used by:  7gbow  48597
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