> Where linearizing GR is concerned, I think it's possible.
> A brief and noisy discussion occurred late year in this
> SPF thread, regarding Orthogonality,
> "Flat/Curved SpaceTime."
>
> How we can understand *covariant and contravariant*
> geometric projections is depicted in Figure 1 in this link,

> I find, the linear expression of GR is formally expressed by,
>
> x_u x_u = x^u x^u , {u=0,1,2,3} , Eq.(kst1)
>
> with the summation convention applying and is generally
> true. The details are explained in "Flat/Curved SpaceTime",
> that were posted last year.

> Hi fella's, I was hoping to further justify a
> statement I posted. concerning Eq.(kst1) below...
>
> On May 15, 1:19 pm, "Ken S. Tucker" wrote:> Where linearizing GR is concerned, I think it's possible.

>> A brief and noisy discussion occurred late year in this
>> SPF thread, regarding Orthogonality,
>> "Flat/Curved SpaceTime."

>

>> How we can understand *covariant and contravariant*
>> geometric projections is depicted in Figure 1 in this link,

>
> http://www.mathpages.com/rr/s5-02/5-02.htm
>

>> I find, the linear expression of GR is formally expressed by,

>

>> x_u x_u = x^u x^u , {u=0,1,2,3} , Eq.(kst1)

>

>> with the summation convention applying and is generally
>> true. The details are explained in "Flat/Curved SpaceTime", ...