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## Homework Statement

Calculate f*f where f is the indicator function (-1,1)

## Homework Equations

The convolution f*g of functions f and g is defined by:

f*g(x)=[itex]\int^{\infty}_{-\infty} f(x-y)g(y)\ dy[/itex]

## The Attempt at a Solution

I haven't really done convolution before as I am teaching myself, so I am looking for a start please.