132 citations · 306 across the 67 of their papers we have counts for
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Hyperbolic motion generated by inversion
Hristu Culetu
An inversion transformation applied to an inertial observer is used to generate a nonstatic conformally flat geometry in spherical coordinates. A static observer in the new geometr…
Black hole horizon around a relativistic star
Hristu Culetu
A star surrounded by a black hole generated by it is analyzed. For an outer static observer the black hole mass (and radius) depends on his position in the gravitational field of t…
Rindler-type geometry inside a black hole
Hristu Culetu
An anisotropic fluid with positive energy density and negative pressures is proposed in the black hole interior. The gravitational field is constant everywhere inside and is given…
Anisotropic fluid inside a relativistic star
Hristu Culetu
An anisotropic fluid with variable energy density and negative pressure is proposed, both outside and inside stars. The gravitational field is constant everywhere in free space (if…