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    Stan Math Library
    5.1.0
    
   Automatic Differentiation 
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  inline | 
Tests if the input is Not a Number (NaN)
Integer specialization, always return false.
| T | Integer type. | 
| x | Value to test. | 
false.Delegates to std::isnan.
| T | Floating point type. | 
| x | Value to test. | 
true if the value is NaN. Definition at line 20 of file is_nan.hpp.