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SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
Mathbox for Alexander van der Vekens
Number theory (extension 2)
Goldbach's conjectures
gbpart9
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Theorem
gbpart9
Description:
The (strong) Goldbach partition of 9.
(Contributed by
AV
, 26-Jul-2020)
Ref
Expression
Assertion
gbpart9
⊢
9
=
3
+
3
+
3
Proof
Step
Hyp
Ref
Expression
1
3p3e6
⊢
3
+
3
=
6
2
1
oveq1i
⊢
3
+
3
+
3
=
6
+
3
3
6p3e9
⊢
6
+
3
=
9
4
2
3
eqtr2i
⊢
9
=
3
+
3
+
3