Re: Unprotect[Pi]

*To*: mathgroup at smc.vnet.net*Subject*: [mg90848] Re: Unprotect[Pi]*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>*Date*: Sat, 26 Jul 2008 04:21:23 -0400 (EDT)*Organization*: The Open University, Milton Keynes, UK*References*: <g6c99d$bu2$1@smc.vnet.net>

Scott wrote: > How does one unprotect symbol Pi and the Greek lower case letter pi > (π)? Unprotect[Pi] doesn't seem to do the job. > > Pi // N > 3.14159 > Unprotect[Pi] > {Pi} > Pi > π > Pi // N > 3.14159 > Unprotect[π] > π//N > 3.14159 I am not sure to have grasped what your try to achieve, but Unprotect[] works fine on my system. The following redefines the value of Pi to the nonsensical complex number 3 - I In[1]:= Unprotect[Pi]; Pi = 3 - I; Protect[Pi]; Pi Out[4]= 3 - I Regards, -- Jean-Marc