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Abs[x] function

• To: mathgroup at smc.vnet.net
• Subject: [mg87816] Abs[x] function
• From: Vladislav <kazimir04 at yahoo.co.uk>
• Date: Fri, 18 Apr 2008 02:37:15 -0400 (EDT)

Who can explain the behavior. THe derivative Abs[x] at x=.5 is well
defined and is equal to 1.

In[1]:= D[Abs[x], x]

Out[1]=
\!\(\*SuperscriptBox["Abs", "\[Prime]",
MultilineFunction->None]\)[x]

In[2]:= % /. x -> .5

Out[2]=
\!\(\*SuperscriptBox["Abs", "\[Prime]",
MultilineFunction->None]\)[0.5]

• Follow-Ups:
  • Re: Abs[x] function
    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>