I would like to know where i can get information about a 3d gaussian integration.If someone can give me more please write me.

Hi I hope this will help you. I saw a book nearly five years ago with the following title:"applied numerical integration". Subjects such as weightd residual and gausaian intergration I saw. Unfortunatly I dont remember other information about the book. If you wanted to integrate in closed form( I mean in symbolic form) I suggest you to check the mathsource at wolfram research. best wishes Reza

Thank you, Reza. I'll do as you have suggested me.

Bye Patrick