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Stan Math Library
5.1.0
Automatic Differentiation
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Return the length of the hypotenuse of a right triangle with opposite and adjacent side lengths given by the specified arguments (C++11).
In symbols, if the arguments are 1 and x2, the result is sqrt(x1 * x1 + x2 * x2).
| T | inner type of the fvar |
| x1 | First argument. |
| x2 | Second argument. |