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I know there are 4 kinds of integrals one can do in four-space:

(1) Integrate a line element, ie. a curve.

(2) Surface integral on a 2-D surface.

(3) Integral on a 3-D hypersurface.

(4) 4-D volume integral.

Landau-Lifgarbagez gives a brief intro in their field theory book but I'd like to clear some things up instead of just having formulae presented to me.

Any suggestions?

Cheers guys!