Theorem tngipOLD

Description: Obsolete proof of tngip as of 31-Oct-2024. The inner product operation of a structure augmented with a norm. (Contributed by Mario Carneiro, 2-Oct-2015) (New usage is discouraged.) (Proof modification is discouraged.)

	Ref	Expression
Hypotheses	tngbas.t	$$⊢T=G\mathrm{toNrmGrp}N$$
	tngip.2	$$⊢\underset{\dot{}}{,}={\cdot }_{𝑖}\left(G\right)$$
Assertion	tngipOLD	$$⊢N\in V\to \underset{\dot{}}{,}={\cdot }_{𝑖}\left(T\right)$$

Proof

Step	Hyp	Ref	Expression
1		tngbas.t	$$⊢T=G\mathrm{toNrmGrp}N$$
2		tngip.2	$$⊢\underset{\dot{}}{,}={\cdot }_{𝑖}\left(G\right)$$
3		df-ip	$$⊢{\cdot }_{𝑖}=\mathrm{Slot}8$$
4		8nn	$$⊢8\in \mathbb{N}$$
5		8lt9	$$⊢8<9$$
6	1 3 4 5	tnglemOLD	$$⊢N\in V\to {\cdot }_{𝑖}\left(G\right)={\cdot }_{𝑖}\left(T\right)$$
7	2 6	eqtrid	$$⊢N\in V\to \underset{\dot{}}{,}={\cdot }_{𝑖}\left(T\right)$$