Services & Resources / Wolfram Forums
MathGroup Archive
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 1991

[Date Index] [Thread Index] [Author Index]

Search the Archive

Question about x_h

  • To: mathgroup at
  • Subject: Question about x_h
  • From: tntg0367 at (Thao N Tran)
  • Date: Fri, 18 Oct 1991 16:22:43 GMT

I would like to use "x_h" to do something like:

	newhead /: test[x_newhead] := new

where I would define the head of the symbol somewhere else:

	Head[y] ^= newhead

But this doesn't work.  When I evaluate "test[y]", I get "test[y]"
back.  If I add a line:

	test[x_Symbol] := stillsymbol

then "test[y]" gives "stillsymbol".  So it seems like my "Head"
assignment for the symbol "y" didn't go through.  How can I make
Mathematica understand what I mean?  Thanks for your help.

		Thao Tran
		t-tran at

  • Prev by Date: Re: Chicago Kinetic Simulator
  • Next by Date: Mma 1.2 memory management bug (not in 2.0)
  • Previous by thread: Question about x_h
  • Next by thread: CABRI?