This was limiting the use of the templates with other non internal types like Ceres types, xithout defining thing like that: `template<> inline constexpr bool is_math_float_type<mpq_class> = true;`
This was limiting the use of the templates with other non internal types like Ceres types, xithout defining thing like that: `template<> inline constexpr bool is_math_float_type<mpq_class> = true;`