Theorem opsrplusgOLD

Description: Obsolete version of opsrplusg as of 1-Nov-2024. The addition operation of the ordered power series structure. (Contributed by Mario Carneiro, 8-Feb-2015) (Revised by Mario Carneiro, 30-Aug-2015) (New usage is discouraged.) (Proof modification is discouraged.)

	Ref	Expression
Hypotheses	opsrbas.s	$$⊢S=I\mathrm{mPwSer}R$$
	opsrbas.o	$$⊢O=\left(I\mathrm{ordPwSer}R\right)\left(T\right)$$
	opsrbas.t	$$⊢\phi \to T\subseteq I\times I$$
Assertion	opsrplusgOLD	$$⊢\phi \to {+}_S={+}_O$$

Proof

Step	Hyp	Ref	Expression
1		opsrbas.s	$$⊢S=I\mathrm{mPwSer}R$$
2		opsrbas.o	$$⊢O=\left(I\mathrm{ordPwSer}R\right)\left(T\right)$$
3		opsrbas.t	$$⊢\phi \to T\subseteq I\times I$$
4		df-plusg	$$⊢{+}_{𝑔}=\mathrm{Slot}2$$
5		2nn	$$⊢2\in \mathbb{N}$$
6		2lt10	$$⊢2<10$$
7	1 2 3 4 5 6	opsrbaslemOLD	$$⊢\phi \to {+}_S={+}_O$$