Metamath Proof Explorer


Theorem ringrng

Description: A unital ring is a (non-unital) ring. (Contributed by AV, 6-Jan-2020)

Ref Expression
Assertion ringrng ( 𝑅 ∈ Ring → 𝑅 ∈ Rng )

Proof

Step Hyp Ref Expression
1 ringabl ( 𝑅 ∈ Ring → 𝑅 ∈ Abel )
2 eqid ( Base ‘ 𝑅 ) = ( Base ‘ 𝑅 )
3 eqid ( mulGrp ‘ 𝑅 ) = ( mulGrp ‘ 𝑅 )
4 eqid ( +g𝑅 ) = ( +g𝑅 )
5 eqid ( .r𝑅 ) = ( .r𝑅 )
6 2 3 4 5 isring ( 𝑅 ∈ Ring ↔ ( 𝑅 ∈ Grp ∧ ( mulGrp ‘ 𝑅 ) ∈ Mnd ∧ ∀ 𝑥 ∈ ( Base ‘ 𝑅 ) ∀ 𝑦 ∈ ( Base ‘ 𝑅 ) ∀ 𝑧 ∈ ( Base ‘ 𝑅 ) ( ( 𝑥 ( .r𝑅 ) ( 𝑦 ( +g𝑅 ) 𝑧 ) ) = ( ( 𝑥 ( .r𝑅 ) 𝑦 ) ( +g𝑅 ) ( 𝑥 ( .r𝑅 ) 𝑧 ) ) ∧ ( ( 𝑥 ( +g𝑅 ) 𝑦 ) ( .r𝑅 ) 𝑧 ) = ( ( 𝑥 ( .r𝑅 ) 𝑧 ) ( +g𝑅 ) ( 𝑦 ( .r𝑅 ) 𝑧 ) ) ) ) )
7 simpl ( ( 𝑅 ∈ Abel ∧ ( 𝑅 ∈ Grp ∧ ( mulGrp ‘ 𝑅 ) ∈ Mnd ∧ ∀ 𝑥 ∈ ( Base ‘ 𝑅 ) ∀ 𝑦 ∈ ( Base ‘ 𝑅 ) ∀ 𝑧 ∈ ( Base ‘ 𝑅 ) ( ( 𝑥 ( .r𝑅 ) ( 𝑦 ( +g𝑅 ) 𝑧 ) ) = ( ( 𝑥 ( .r𝑅 ) 𝑦 ) ( +g𝑅 ) ( 𝑥 ( .r𝑅 ) 𝑧 ) ) ∧ ( ( 𝑥 ( +g𝑅 ) 𝑦 ) ( .r𝑅 ) 𝑧 ) = ( ( 𝑥 ( .r𝑅 ) 𝑧 ) ( +g𝑅 ) ( 𝑦 ( .r𝑅 ) 𝑧 ) ) ) ) ) → 𝑅 ∈ Abel )
8 mndsgrp ( ( mulGrp ‘ 𝑅 ) ∈ Mnd → ( mulGrp ‘ 𝑅 ) ∈ Smgrp )
9 8 3ad2ant2 ( ( 𝑅 ∈ Grp ∧ ( mulGrp ‘ 𝑅 ) ∈ Mnd ∧ ∀ 𝑥 ∈ ( Base ‘ 𝑅 ) ∀ 𝑦 ∈ ( Base ‘ 𝑅 ) ∀ 𝑧 ∈ ( Base ‘ 𝑅 ) ( ( 𝑥 ( .r𝑅 ) ( 𝑦 ( +g𝑅 ) 𝑧 ) ) = ( ( 𝑥 ( .r𝑅 ) 𝑦 ) ( +g𝑅 ) ( 𝑥 ( .r𝑅 ) 𝑧 ) ) ∧ ( ( 𝑥 ( +g𝑅 ) 𝑦 ) ( .r𝑅 ) 𝑧 ) = ( ( 𝑥 ( .r𝑅 ) 𝑧 ) ( +g𝑅 ) ( 𝑦 ( .r𝑅 ) 𝑧 ) ) ) ) → ( mulGrp ‘ 𝑅 ) ∈ Smgrp )
10 9 adantl ( ( 𝑅 ∈ Abel ∧ ( 𝑅 ∈ Grp ∧ ( mulGrp ‘ 𝑅 ) ∈ Mnd ∧ ∀ 𝑥 ∈ ( Base ‘ 𝑅 ) ∀ 𝑦 ∈ ( Base ‘ 𝑅 ) ∀ 𝑧 ∈ ( Base ‘ 𝑅 ) ( ( 𝑥 ( .r𝑅 ) ( 𝑦 ( +g𝑅 ) 𝑧 ) ) = ( ( 𝑥 ( .r𝑅 ) 𝑦 ) ( +g𝑅 ) ( 𝑥 ( .r𝑅 ) 𝑧 ) ) ∧ ( ( 𝑥 ( +g𝑅 ) 𝑦 ) ( .r𝑅 ) 𝑧 ) = ( ( 𝑥 ( .r𝑅 ) 𝑧 ) ( +g𝑅 ) ( 𝑦 ( .r𝑅 ) 𝑧 ) ) ) ) ) → ( mulGrp ‘ 𝑅 ) ∈ Smgrp )
11 simpr3 ( ( 𝑅 ∈ Abel ∧ ( 𝑅 ∈ Grp ∧ ( mulGrp ‘ 𝑅 ) ∈ Mnd ∧ ∀ 𝑥 ∈ ( Base ‘ 𝑅 ) ∀ 𝑦 ∈ ( Base ‘ 𝑅 ) ∀ 𝑧 ∈ ( Base ‘ 𝑅 ) ( ( 𝑥 ( .r𝑅 ) ( 𝑦 ( +g𝑅 ) 𝑧 ) ) = ( ( 𝑥 ( .r𝑅 ) 𝑦 ) ( +g𝑅 ) ( 𝑥 ( .r𝑅 ) 𝑧 ) ) ∧ ( ( 𝑥 ( +g𝑅 ) 𝑦 ) ( .r𝑅 ) 𝑧 ) = ( ( 𝑥 ( .r𝑅 ) 𝑧 ) ( +g𝑅 ) ( 𝑦 ( .r𝑅 ) 𝑧 ) ) ) ) ) → ∀ 𝑥 ∈ ( Base ‘ 𝑅 ) ∀ 𝑦 ∈ ( Base ‘ 𝑅 ) ∀ 𝑧 ∈ ( Base ‘ 𝑅 ) ( ( 𝑥 ( .r𝑅 ) ( 𝑦 ( +g𝑅 ) 𝑧 ) ) = ( ( 𝑥 ( .r𝑅 ) 𝑦 ) ( +g𝑅 ) ( 𝑥 ( .r𝑅 ) 𝑧 ) ) ∧ ( ( 𝑥 ( +g𝑅 ) 𝑦 ) ( .r𝑅 ) 𝑧 ) = ( ( 𝑥 ( .r𝑅 ) 𝑧 ) ( +g𝑅 ) ( 𝑦 ( .r𝑅 ) 𝑧 ) ) ) )
12 2 3 4 5 isrng ( 𝑅 ∈ Rng ↔ ( 𝑅 ∈ Abel ∧ ( mulGrp ‘ 𝑅 ) ∈ Smgrp ∧ ∀ 𝑥 ∈ ( Base ‘ 𝑅 ) ∀ 𝑦 ∈ ( Base ‘ 𝑅 ) ∀ 𝑧 ∈ ( Base ‘ 𝑅 ) ( ( 𝑥 ( .r𝑅 ) ( 𝑦 ( +g𝑅 ) 𝑧 ) ) = ( ( 𝑥 ( .r𝑅 ) 𝑦 ) ( +g𝑅 ) ( 𝑥 ( .r𝑅 ) 𝑧 ) ) ∧ ( ( 𝑥 ( +g𝑅 ) 𝑦 ) ( .r𝑅 ) 𝑧 ) = ( ( 𝑥 ( .r𝑅 ) 𝑧 ) ( +g𝑅 ) ( 𝑦 ( .r𝑅 ) 𝑧 ) ) ) ) )
13 7 10 11 12 syl3anbrc ( ( 𝑅 ∈ Abel ∧ ( 𝑅 ∈ Grp ∧ ( mulGrp ‘ 𝑅 ) ∈ Mnd ∧ ∀ 𝑥 ∈ ( Base ‘ 𝑅 ) ∀ 𝑦 ∈ ( Base ‘ 𝑅 ) ∀ 𝑧 ∈ ( Base ‘ 𝑅 ) ( ( 𝑥 ( .r𝑅 ) ( 𝑦 ( +g𝑅 ) 𝑧 ) ) = ( ( 𝑥 ( .r𝑅 ) 𝑦 ) ( +g𝑅 ) ( 𝑥 ( .r𝑅 ) 𝑧 ) ) ∧ ( ( 𝑥 ( +g𝑅 ) 𝑦 ) ( .r𝑅 ) 𝑧 ) = ( ( 𝑥 ( .r𝑅 ) 𝑧 ) ( +g𝑅 ) ( 𝑦 ( .r𝑅 ) 𝑧 ) ) ) ) ) → 𝑅 ∈ Rng )
14 13 ex ( 𝑅 ∈ Abel → ( ( 𝑅 ∈ Grp ∧ ( mulGrp ‘ 𝑅 ) ∈ Mnd ∧ ∀ 𝑥 ∈ ( Base ‘ 𝑅 ) ∀ 𝑦 ∈ ( Base ‘ 𝑅 ) ∀ 𝑧 ∈ ( Base ‘ 𝑅 ) ( ( 𝑥 ( .r𝑅 ) ( 𝑦 ( +g𝑅 ) 𝑧 ) ) = ( ( 𝑥 ( .r𝑅 ) 𝑦 ) ( +g𝑅 ) ( 𝑥 ( .r𝑅 ) 𝑧 ) ) ∧ ( ( 𝑥 ( +g𝑅 ) 𝑦 ) ( .r𝑅 ) 𝑧 ) = ( ( 𝑥 ( .r𝑅 ) 𝑧 ) ( +g𝑅 ) ( 𝑦 ( .r𝑅 ) 𝑧 ) ) ) ) → 𝑅 ∈ Rng ) )
15 6 14 syl5bi ( 𝑅 ∈ Abel → ( 𝑅 ∈ Ring → 𝑅 ∈ Rng ) )
16 1 15 mpcom ( 𝑅 ∈ Ring → 𝑅 ∈ Rng )