doc/api/a00140_source.html

 #pragma once
 #include "../detail/type_mat2x2.hpp"

 namespace glm
 {

     typedef mat<2, 2, float, defaultp>      mat2x2;

     typedef mat<2, 2, float, defaultp>      mat2;

 }//namespace glm
glm::mat2
mat< 2, 2, float, defaultp > mat2
2 columns of 2 components matrix of single-precision floating-point numbers.
Definition: matrix_float2x2.hpp:20

glm::mat2x2
mat< 2, 2, float, defaultp > mat2x2
2 columns of 2 components matrix of single-precision floating-point numbers.
Definition: matrix_float2x2.hpp:15

glm
Definition: common.hpp:20