Metamath Proof Explorer


Theorem opsrplusg

Description: The addition operation of the ordered power series structure. (Contributed by Mario Carneiro, 8-Feb-2015) (Revised by Mario Carneiro, 30-Aug-2015)

Ref Expression
Hypotheses opsrbas.s 𝑆 = ( 𝐼 mPwSer 𝑅 )
opsrbas.o 𝑂 = ( ( 𝐼 ordPwSer 𝑅 ) ‘ 𝑇 )
opsrbas.t ( 𝜑𝑇 ⊆ ( 𝐼 × 𝐼 ) )
Assertion opsrplusg ( 𝜑 → ( +g𝑆 ) = ( +g𝑂 ) )

Proof

Step Hyp Ref Expression
1 opsrbas.s 𝑆 = ( 𝐼 mPwSer 𝑅 )
2 opsrbas.o 𝑂 = ( ( 𝐼 ordPwSer 𝑅 ) ‘ 𝑇 )
3 opsrbas.t ( 𝜑𝑇 ⊆ ( 𝐼 × 𝐼 ) )
4 df-plusg +g = Slot 2
5 2nn 2 ∈ ℕ
6 2lt10 2 < 1 0
7 1 2 3 4 5 6 opsrbaslem ( 𝜑 → ( +g𝑆 ) = ( +g𝑂 ) )