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| − | \sum_{l=-\infty}^\infty a_lb_{k-l}</math> | + | <math>\sum_{l=-\infty}^\infty a_lb_{k-l}</math> |
| + | </math>\sum_{l=-\infty}^\infty a_lb_{k-l}</math> | ||
Revision as of 18:25, 8 July 2009
$ \sum_{l=-\infty}^\infty a_lb_{k-l} $ </math>\sum_{l=-\infty}^\infty a_lb_{k-l}</math>
