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SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
Mathbox for Alexander van der Vekens
Number theory (extension 2)
Goldbach's conjectures
gbpart7
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gbpart8
Metamath Proof Explorer
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Theorem
gbpart7
Description:
The (weak) Goldbach partition of 7.
(Contributed by
AV
, 20-Jul-2020)
Ref
Expression
Assertion
gbpart7
⊢
7
=
2
+
2
+
3
Proof
Step
Hyp
Ref
Expression
1
2p2e4
⊢
2
+
2
=
4
2
1
oveq1i
⊢
2
+
2
+
3
=
4
+
3
3
4p3e7
⊢
4
+
3
=
7
4
2
3
eqtr2i
⊢
7
=
2
+
2
+
3