On the genesis of Post constraint in modern electromagnetism
Abstract The genesis of the Post constraint is premised on two attributes of modern electromagnetism: (i) its microscopic nature, and (ii) the status of
 e ˜ ( x , t ) and
 b ˜ ( x , t ) as the primitive electromagnetic fields. This constraint can therefore not arise in EH-electromagnetism, wherein the primitive electromagnetic fields are the macroscopic fields
 e ˜ ( x , t ) and
 H ˜ ( x , t ) . Available experimental evidence against the Post constraint is incomplete and inconclusive.