W.Thirring , H.Narnhofer 
Covariant QED without Indefinite Metric
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ABSTRACT.  We construct for the linearized Higgs model a representation of the
field operators in a Hilbert space H with the following features:
	1) H has a positive definite metric but is nonseparable.
	2) The vacuum is gauge invariant.
	3) The gauge variant operators exist only in their exponentiated
	form as unitaries.
	4) There is a subspace of H where $A_\mu{}^{,\mu}$ is represented
	by 0.