Theorem gbpart9 47879

Description: The (strong) Goldbach partition of 9. (Contributed by AV, 26-Jul-2020.)

Assertion

Ref	Expression
gbpart9	⊢ 9 = ((3 + 3) + 3)

Proof of Theorem gbpart9

Step	Hyp	Ref	Expression
1		3p3e6 12272	. . 3 ⊢ (3 + 3) = 6
2	1	oveq1i 7356	. 2 ⊢ ((3 + 3) + 3) = (6 + 3)
3		6p3e9 12280	. 2 ⊢ (6 + 3) = 9
4	2, 3	eqtr2i 2755	1 ⊢ 9 = ((3 + 3) + 3)

Syntax hints:   = wceq 1541  (class class class)co 7346   + caddc 11009  3c3 12181  6c6 12184  9c9 12187

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2113  ax-9 2121  ax-ext 2703  ax-1cn 11064  ax-addcl 11066  ax-addass 11071

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-clab 2710  df-cleq 2723  df-clel 2806  df-rab 3396  df-v 3438  df-dif 3900  df-un 3902  df-ss 3914  df-nul 4281  df-if 4473  df-sn 4574  df-pr 4576  df-op 4580  df-uni 4857  df-br 5090  df-iota 6437  df-fv 6489  df-ov 7349  df-2 12188  df-3 12189  df-4 12190  df-5 12191  df-6 12192  df-7 12193  df-8 12194  df-9 12195

This theorem is referenced by:  9gbo  47884