double integral signThe double integral sign is used to indicate mathematical integration performed twice in succession. Double integrals are used to calculate the integral s of function s in two variable s. An example is the volume under a surface in three-dimensional ( 3D ) space. The double integral sign appears as two single integral signs, placed one after the other: A typical expression for an indefinite integral of a function f of two variables x and y using the double integral sign is:  f ( x , y ) dx dy
In this expression, the function is first integrated with respect to x , and then with respect to y .
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Sep 21, 2005 |
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