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Change multiplication operations into convolution operations


If I want to change the multiplication operations  into convolution
operations in an arbitrary function such as
C1 F1[t] F2[t] + C2 F3[t] F4[t] F1[t],
where Fi(t) represents functions of t and Ci represents constant, into
C1 F1[t] * F2[t] + C2 F3[t] * F4[t] * F1[t], where "*" indicate
convolution.

any good elegant way to do it? High appreciations!

Liang




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