Erf or Hypergeometric1F1

*To*: mathgroup at yoda.physics.unc.edu*Subject*: Erf or Hypergeometric1F1*From*: Roque Donizete de Oliveira <oliveria at engin.umich.edu>*Date*: Sun, 4 Oct 92 01:15:06 -0400

This is Mma 1.2 on an apollo. In[12]:= Hypergeometric1F1[1, 3/2, -z^2] 3 2 Out[12]= Hypergeometric1F1[1, -, -z ] 2 This is Mma 2.1 on a decstation 5000. In[31]:= Hypergeometric1F1[1, 3/2, -z^2] 2 2 -(Sqrt[Pi] Sqrt[-z ] Erf[Sqrt[-z ]]) Out[31]= ------------------------------------ 2 z 2 2 E z As you can see, it wrote Hypergeometric1F1 in terms of Erf. I don't want that. How can I prevent MMa2.1 from converting/simplifying my original function ? Thanks. Roque oliveria at caen.engin.umich.edu