Re: More /.{I->-1} craziness
- To: mathgroup at smc.vnet.net
- Subject: [mg106298] Re: More /.{I->-1} craziness
- From: Vince Virgilio <blueschi at gmail.com>
- Date: Thu, 7 Jan 2010 02:34:10 -0500 (EST)
- References: <200912300915.EAA17299@smc.vnet.net> <hhhmn8$o9t$1@smc.vnet.net>
On Jan 6, 5:59 am, Richard Fateman <fate... at cs.berkeley.edu> wrote: SNIP > > What I would say is > > Because of the disparity in internal representations (see below) , > for replacements on parts of complex expressions, don't use /. ... > use /. BetterRules[ ...] > This expects too much from ReplaceAll. > or use transformation or selection programs such as Conjugate, Im, Re, .. . > Yes. Not unlike something Andrzej said elsewhere about PolynomialReduce (others said similar as well). SNIP Vince Virgilio ( Incidentally, my FullForm of x+4*I differs from yours, if I read yours correctly: In[1]:= x+4I//FullForm Out[1]//FullForm= Plus[Complex[0,4],x] )