how to make symbols used in differential equations and maths etc character map information needed

[Tapas Mishra]

On Sat, Mar 5, 2011 at 9:35 PM, Tony Pursell
<ajp at princeswalk.fsnet.co.uk> wrote:
> On Sat, 2011-03-05 at 20:49 +0530, Tapas Mishra wrote:
> To type a character from Applications > Accessories > Character Map, use
> Ctrl-Shift-U (prints a small underlined u) then key the Unicode given in
> Character Map, then hit Enter or Return.
>
> Eg Ctrl-Shift-u, 0123, Return, gives ģ.
>
> Is that what you want?
>
> Tony
>
I am specifically looking for the symbol of differential.