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Theorem gbpart7 48266
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 12303 . . 3 (2 + 2) = 4
21oveq1i 7367 . 2 ((2 + 2) + 3) = (4 + 3)
3 4p3e7 12322 . 2 (4 + 3) = 7
42, 3eqtr2i 2763 1 7 = ((2 + 2) + 3)
Colors of variables: wff setvar class
Syntax hints:   = wceq 1547  (class class class)co 7357   + caddc 11033  2c2 12228  3c3 12229  4c4 12230  7c7 12233
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-ext 2711  ax-1cn 11088  ax-addcl 11090  ax-addass 11095
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-sb 2074  df-clab 2718  df-cleq 2731  df-clel 2814  df-rab 3392  df-v 3433  df-dif 3886  df-un 3888  df-ss 3900  df-nul 4263  df-if 4456  df-sn 4557  df-pr 4559  df-op 4563  df-uni 4840  df-br 5074  df-iota 6442  df-fv 6494  df-ov 7360  df-2 12236  df-3 12237  df-4 12238  df-5 12239  df-6 12240  df-7 12241
This theorem is referenced by:  7gbow  48271
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