Is the summation notation for three equivalent expressions?

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The discussion centers on the equivalence of three mathematical expressions involving summation notation. The expressions in question are P_{\alpha}A^{\beta}\tilde{\omega}^{\beta}(\vec{e_{\beta}}), \sum_{\alpha = 0}^{3}{P_{\alpha}\tilde{\omega}^{\alpha}(\sum_{\beta = 0}^{3}{A^{\beta}\vec{e}_{\beta}})}, and \sum_{\alpha = 0}^{3}{P_{\alpha}A^{\alpha}}. It is established that the second equality is valid if the \(\tilde{\omega}\) terms are dual basis vectors. A correction is noted for the first expression, requiring a change from beta to alpha for consistency. Additionally, it is advised to use a single set of \textit{tex} tags for clarity.

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schwarzschild
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Are the following three equivalent?

[tex]P_{\alpha}A^{\beta}\tilde{\omega}^{\beta}(\vec{e_{\beta}} )[/tex] [tex]= \sum_{\alpha = 0}^{3}{P_{\alpha}\tilde{\omega}^{\alpha}(\sum_{\beta = 0}^{3}{A^{\beta}\vec{e}_{\beta}) = \sum_{\alpha = 0}^{3}{P_{\alpha}A^{\alpha}[/tex]
 
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The second equality is correct, assuming that the omegas are dual basis vectors. The first expression doesn't make sense, but it looks like a typo. Change the second beta to an alpha, and the first equality is good too.
 
Don't use two sets of tex /tex tags; enclose the whole equality in one set of tex /tex tags.
 

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