# Vibrational mode "cofactor" ?

1. Apr 29, 2015

### Wminus

Here's a problem I am doing right now.

What are the cofactors " $\Delta_{i \alpha}$"? I know they are represent the minor of some determinant, but I am confused and can't see which determinant it is.

Also, could somebody please help me and explain why $( V_{ij} - \omega^2 T_{ij} ) \Delta_{i \alpha}$?

Thanks

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Last edited: Apr 29, 2015
2. Apr 29, 2015

### rumborak

3. Apr 30, 2015