||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 8th Edition ||

/* code_begins */

{{{
x,y=var('x,y')
plot3d(1-(y**2 + x**2), (y,-10,10),(x,-10,10)
}}}

/* code_ends */

 * '''Solution by''': 
   * <murthy>, <student>, <snist>
   * <abhilash>,<student>, <snist>
   * <anoop>,<student>, <snist>