Given that:
$\displaystyle g_{ij}=E_i \cdot E_j $
is it true and how would I show that:
$\displaystyle g^{ij}=E^i \cdot E^j $
I am sure that this should be easy, but my brain is fried.
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Given that:
$\displaystyle g_{ij}=E_i \cdot E_j $
is it true and how would I show that:
$\displaystyle g^{ij}=E^i \cdot E^j $
I am sure that this should be easy, but my brain is fried.
