Cm. Zhang et al., TORSION SINGULARITY IN WEITZENBOCK SPACE-TIME, Nuovo cimento della Societa italiana di fisica. B, Relativity, classical and statistical physics, 110(2), 1995, pp. 231-236
In the framework of gravitational gauge theory with torsion in Weitzen
bock space-time, scalar polynomial torsion singularity and scalar Riem
ann-Christoffel curvature singularity are studied by a static spherica
l symmetric vacuum solutions. Although the parameter epsilon = 0, gene
ral relativity is recovered in a limit case and there exists torsion s
ingularity at the Schwarzshild radius. Generally, there exists torsion
and Riemann-Christoffel curvature singularity without real event hori
zon.