25 citations · 32 across the 4 of their papers we have counts for
4 papers
The Reciprocal of the Fundamental Theorem of Riemannian Geometry
Héctor H. Calderón
The fundamental theorem of Riemannian geometry is inverted for analytic Christoffel symbols. The inversion formula, henceforth dubbed Ricardo's formula, is obtained without ancilla…
Quantum fields near phantom-energy `sudden' singularities
Hector H. Calderon
This paper is committed to calculations near a type of future singularity driven by phantom energy. At the singularities considered, the scale factor remains finite but its derivat…
Effects of quantized fields on the spacetime geometries of static spherically symmetric black holes
Paul R. Anderson, Mathew Binkley, Hector Calderon +3
Analytic approximations for the stress-energy of quantized fields in the Hartle-Hawking state in static black hole spacetimes predict divergences on the event horizon of the black…
Quantum fields and "Big Rip" expansion singularities
Hector Calderon, William A. Hiscock
The effects of quantized conformally invariant massless fields on the evolution of cosmological models containing a ``Big Rip'' future expansion singularity are examined. Quantized…