08/11/2007, 07:58 PM
No, actually, I think the claim is that \( DE_b^{[t]}(x) \) fails to converge for non-integer t. I'm not convinced of this, but apparently Jabotinsky uses L-functions and L-sequences to prove this. I need to read the references too. By the way I've found both of Jabotinsky's papers on L-stuff on JSTOR. So jaydfox, if you live near a University with JSTOR access, you might want to pay them a visit. 
Andrew Robbins

Andrew Robbins

