Why these graphs differ?

*To*: mathgroup at smc.vnet.net*Subject*: [mg33925] Why these graphs differ?*From*: Vladimir Bondarenko <vvb at mail.strace.net>*Date*: Tue, 23 Apr 2002 07:13:56 -0400 (EDT)*Reply-to*: Vladimir Bondarenko <vvb at mail.strace.net>*Sender*: owner-wri-mathgroup at wolfram.com

These solutions, naturally, coincide. DSolve[{y'[z] == z, y[0] == 1}, y[z], z][[1, 1, 2]] Evaluate[DSolve[{y'[z] == z, y[0] == 1}, y[z], z][[1, 1, 2]]] (2 + z^2)/2 (2 + z^2)/2 But, surprisingly, the corresponding graphs are not identical: Plot[ DSolve[{y'[z] == z, y[0] == 1}, y[z], z][[1, 1, 2]], {z, 0, 1}] Plot[Evaluate[DSolve[{y'[z] == z, y[0] == 1}, y[z], z][[1, 1, 2]]], {z, 0, 1}] Is it a feature or a problem? Vladimir Bondarenko