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Newbie: convolution of impulse sequences


Hello,

I am new to mathematica, but I would like to symbolicaly convolve two 
impulse sequences ... both sequences use different sampling techniques
here is what I have so far ...

impulseTrain1[_t] := DiracDelta[f - t]
impulseTrain2[_t] := DiracDelta[f - 10^t]

I would like the variable 't' to be discrete and a natural number.

I would like to convolve impulseTrain1 and impulseTrain2. I would 
like the result to still be symbolic ... is it possible ??

thanks
Matt

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