7. If we factor out a "matrix algebra" class, then it would make sense
to replace the custom embedding/unembedding functions with static
_real_embedding() and _real_unembedding() methods.
7. If we factor out a "matrix algebra" class, then it would make sense
to replace the custom embedding/unembedding functions with static
_real_embedding() and _real_unembedding() methods.