- #1

- 2

- 0

Recently I started to use index notation, but still the division is not clear for me. I'll mention just some simple examples that I'm not sure about:

Does [itex]a =\frac{1}{b_i}[/itex] mean that [itex]a = \sum_{i=1}^{3}\frac{1}{b_i}[/itex] or [itex]a = 1 / \sum_{i = 1}^{3}b_i[/itex] ?

Similarly, does [itex]a_i =\frac{b_i}{c_{jj}}[/itex] mean that [itex]a_i = \sum_{j=1}^{3}\frac{b_i}{c_{jj}}[/itex] or [itex]a = b_i / \sum_{j = 1}^{3}c_{jj}[/itex] ?

thanks beforehand!