Database
BASIC ALGEBRAIC STRUCTURES
Rings
Non-unital rings ("rngs")
rngabl
Next ⟩
rngmgp
Metamath Proof Explorer
Ascii
Unicode
Theorem
rngabl
Description:
A non-unital ring is an (additive) abelian group.
(Contributed by
AV
, 17-Feb-2020)
Ref
Expression
Assertion
rngabl
⊢
R
∈
Rng
→
R
∈
Abel
Proof
Step
Hyp
Ref
Expression
1
eqid
⊢
Base
R
=
Base
R
2
eqid
⊢
mulGrp
R
=
mulGrp
R
3
eqid
⊢
+
R
=
+
R
4
eqid
⊢
⋅
R
=
⋅
R
5
1
2
3
4
isrng
⊢
R
∈
Rng
↔
R
∈
Abel
∧
mulGrp
R
∈
Smgrp
∧
∀
x
∈
Base
R
∀
y
∈
Base
R
∀
z
∈
Base
R
x
⋅
R
y
+
R
z
=
x
⋅
R
y
+
R
x
⋅
R
z
∧
x
+
R
y
⋅
R
z
=
x
⋅
R
z
+
R
y
⋅
R
z
6
5
simp1bi
⊢
R
∈
Rng
→
R
∈
Abel