 Similarly, the modified Bessel function of the first kind can be defined as

The procedure can of course be reversed, so that we may define the Bessel–Clifford function as

but from this starting point we would then need to show formula_9 was entire.From the defining series, it follows immediately that formula_10

Using this, we may rewrite the differential equation for formula_9 as

which defines the recurrence relationship for the Bessel–Clifford function.This is equivalent to a similar relation for 
0"F"1.