Add cpp/Math/
Minor style changes to cpp/Math/linalg.h
Update include in cpp/Math/linalg.h
Add `const` to `operator==` and `operator!=` for `MatrixArrayAdapter` in cpp/Math/linalg.h
Fix `MatrixArrayAdapter` in cpp/Math/linalg.h
Use trailing underscore for member names in cpp/Math/linalg.h
Minor style changes in cpp/Math/linalg_python.h