Re: How to Clear y'[0]
- To: mathgroup at smc.vnet.net
- Subject: [mg57261] Re: How to Clear y'[0]
- From: Peter Pein <petsie at dordos.net>
- Date: Sun, 22 May 2005 03:59:48 -0400 (EDT)
- References: <d6mmis$ggo$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Joseph Fagan schrieb:
> Newbie.
> 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]
>
> However
>
> 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.
>
>
Hello,
Clear[y] does not clear y[0]?
If I observed that behaviour, I'd reinstall Mathematica.
In[1]:=
y[0] = 1;
y[0]
Clear[y];
y[0]
Out[2]=
1
Out[4]=
y[0]
--
Peter Pein
Berlin