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| Ok you see I did a list of pn2 values for naturals from 0 to 10 and get real vectors. It seems the only complex values occur when n is not an integer. I'm now trying to use discrete plot....thank you very much, I didn't notice plot is continuous,... |
| ok thx |
| Also, to my surprise N0[z_] := z*D[-Log[1 - z], z] works fine! |
| If after the third line I ask the value of `D[L[b], b]` I get an expression wich has both b and e. Then why can´t I define a function with argument e_ calling the latter expression on the right hand side ...if i directly write the expresion, it... |