Abstract
We are investigating a class of representations of the conformal group which are physically interesting because there exists a position-time 4-vector operator within them and, related to this, because they are used in field transformation laws. We show that in these representations the three Casimir operators of the group have a very simple interpretation; we discuss when these representations are irreducible and we show that this 4-position operator can be expressed in terms of the generators of the group.
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