doc/api/a00164_source.html

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

 namespace glm
 {

     typedef mat<3, 3, float, defaultp>          mat3x3;

     typedef mat<3, 3, float, defaultp>          mat3;

 }//namespace glm
glm::mat3x3
mat< 3, 3, float, defaultp > mat3x3
3 columns of 3 components matrix of single-precision floating-point numbers.
Definition: matrix_float3x3.hpp:15

glm::mat3
mat< 3, 3, float, defaultp > mat3
3 columns of 3 components matrix of single-precision floating-point numbers.
Definition: matrix_float3x3.hpp:20

glm
Definition: common.hpp:20