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SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
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Affine, Euclidean, and Cartesian geometry
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bj-flddrng
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Metamath Proof Explorer
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Theorem
bj-flddrng
Description:
Fields are division rings.
(Contributed by
BJ
, 6-Jan-2024)
Ref
Expression
Assertion
bj-flddrng
⊢
Field
⊆
DivRing
Proof
Step
Hyp
Ref
Expression
1
df-field
⊢
Field
=
DivRing
∩
CRing
2
inss1
⊢
DivRing
∩
CRing
⊆
DivRing
3
1
2
eqsstri
⊢
Field
⊆
DivRing