The probability integral (error function) , the generalized error function , the complementary error function , the imaginary error function , the inverse error function , the inverse of the generalized error function , and the inverse complementary error function are defined through the following formulas:
These seven functions are typically called probability integrals and their inverses.
Instead of using definite integrals, the three univariate error functions can be defined through the following infinite series.
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