in section seven. More in detail, here is what we will do:\
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In section two we recall the canonical formulation of the Nambu – Goto string, the actual geometrical object under consideration. The Polyakov string usually employed in string theory introduces an auxiliary worldsheet metric which is locally pure gauge due to the worldsheet diffeomorphism invariance and an additional Weyl invariance which is absent in the Nambu – Goto formulation. We thus emphasize that there is never any worldsheet metric to be discussed and that Weyl invariance never appears in our formulation. The only local symmetry group is the diffeomorphism (or reparameterization) group Diff$(M)$ of the two – dimensional worldsheet $M$. We never gauge fix that symmetry in contrast to usual string theory in the Polyakov formulation where one usually uses the conformal gauge which allows to fix the worldsheet metric $g$ to be locally flat $\eta$. This gauge fixes the Weyl invariance of the Polyakov string, however, it only partially fixes worldsheet diffeomorphism invariance since conformal symmetries $\varphi\in$Conf$_\eta(M)\subset Diff(M)$ (with respect to the flat worldsheet metric $\eta$) are still allowed. This residual symmetry is the reason for the importance of conformal QFT techniques in usual string theory, however, 