doc/api/a00110_source.html

 #pragma once
 #include "../detail/type_mat3x3.hpp"

 namespace glm
 {

     typedef mat<3, 3, double, defaultp>     dmat3x3;

     typedef mat<3, 3, double, defaultp>     dmat3;

 }//namespace glm
glm::dmat3
mat< 3, 3, double, defaultp > dmat3
3 columns of 3 components matrix of double-precision floating-point numbers.
Definition: matrix_double3x3.hpp:20

glm::dmat3x3
mat< 3, 3, double, defaultp > dmat3x3
3 columns of 3 components matrix of double-precision floating-point numbers.
Definition: matrix_double3x3.hpp:15

glm
Definition: common.hpp:20