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I am not sure how exactly to interpret this kind of notation.

I understand the second one to read sum of over $k$ of $\gamma_{k,j}$ is equal to zero. Is that the same as:

$\gamma_{1,1}+\gamma_{2,1}+\gamma_{3,1}\dots=0$

$\gamma_{1,2}+\gamma_{2,2}+\gamma_{3,2}\dots=0$

etc...

Thank you so much. enter image description here

Sigur
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snoram
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1 Answers1

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It might have been clearer if they wrote $$\sum_j \gamma_{kj}=0 \quad \sum_k \gamma_{kj}=0$$ Your understanding is correct. You can think of the $\gamma_{jk}$ as filling up an array. The first one says the sum of any column is zero, the second that the sum of any row is zero.

Ross Millikan
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