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MathGroup Archive 2006

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Re: Unprotecting "I"

  • To: mathgroup at
  • Subject: [mg64807] Re: Unprotecting "I"
  • From: "Jens-Peer Kuska" <kuska at>
  • Date: Sat, 4 Mar 2006 02:35:18 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <du83rr$t12$>
  • Sender: owner-wri-mathgroup at


you can't change anything on a locked symbol.


"Chris Young" <c1572young at> schrieb 
im Newsbeitrag news:du83rr$t12$1 at
| I'd like to be able to occasionally use all the 
letters of the alphabet
| (or at least the first 12 or so), both small and 
capital letters, for
| variables. I think it's the easiest way to 
present a lot of formulas. I
| was able to Unprotect everything except "I", 
which Mathematica reserves
| for the "imaginary unity", "i". Is there any way 
to temporarily
| unprotect "I"?
| (Also, I wish there was some way to copy the 
example from my notebook
| without all the extraneous back-slashes, etc.)
| What I get from Mathematica is as follows:
| Unprotect[I]
|    Protect::locked: "Symbol \[ImaginaryI] is 
| Attributes[I]
|    {Locked, Protected, ReadProtected}
| ClearAttributes[I, Locked]
|    Attributes::locked: Symbol \[ImaginaryI] is 
| Clear[I]
|    Clear::wrsym: Symbol \[ImaginaryI] is 
| ClearAll[I]
|    ClearAll::"wrsym": "Symbol \[ImaginaryI] is 
| Any help appreciated.
| -- Chris Young
|    c56young at

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