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MathGroup Archive 2005

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How to Clear y'[0]

  • To: mathgroup at
  • Subject: [mg57233] How to Clear y'[0]
  • From: "Joseph Fagan" <noemailplease at>
  • Date: Sat, 21 May 2005 02:40:21 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

Acidently input
DSolve[{y''[t] == y[t], y[0] = 1}, y, t]

and end up setting y[0] to 1, instead of

DSolve[{y''[t] == y[t], y[0] == 1}, y, t]


Clear[ y , y[0] , "y*" ]

fails to Clear y[0] (not a symbol or a string) and I need to exit the 
program and start again.

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