can we define a multivariable power series (laurent series)(adsbygoogle = window.adsbygoogle || []).push({});

[tex] \sum_{i,j,k,l,.....=-\infty}^{\infty}a_{i,j,k,l,......}(X-a)^{i}(Y-b)^{j}(Z-c)^{k}(W-k)^{l}.... [/tex]

indices i,j k and l run over ALL the integers positive and negatives

how could i calculate the coefficients ?? [tex] a_{i,j,k,l} [/tex] ?????

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# Multivariable Laurent Series

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