Generalized Kronecker and permanent deltas, their spinor and tensor equivalents and applications

Source abstract

The aim of this paper is fourfold: (i) to introduce a generalized permanent delta on an equal footing with the generalized Kronecker delta, to use for the symmetries of any tensor or spinor, (ii) to cite an ancillary reference source of comprehensive tensorial and spinorial combinatorial formulas for both, (iii) to table spinor equivalents of these individual tensors and give examples of their usage, and (iv) to tabulate the tensor equivalents of various useful combinations of their spinor forms.