201 citations · 2.2k across the 98 of their papers we have counts for
6 papers · 1 filter
Noncommutative geometry and MOND
Peter K. F. Kuhfittig
Modified Newtonian dynamics (MOND) is a hypothesized modification of Newton's law of universal gravitation to account for the flat rotation curves in the outer regions of galaxies,…
Periodic signature change in spacetimes of embedding class one
Peter K. F. Kuhfittig
The idea of an oscillating Universe has remained a topic of interest even after the discovery of dark energy. This paper confirms this idea by means of another well-established the…
A note on wormholes as compact stellar objects
Peter K. F. Kuhfittig
A Morris-Thorne wormhole can only be sustained by violating the null energy condition, thereby requiring the existence of "exotic matter," a requirement that many researchers consi…
A survey of recent studies concerning the extreme properties of Morris-Thorne wormholes
Peter K. F. Kuhfittig
It has been known for a long time that Morris-Thorne wormholes can only be held open by violating the null energy condition, which can be expressed in the form , where $τ…
Using embedding theorems to account for the extreme properties of traversable wormholes
Peter K. F. Kuhfittig
Embedding theorems, which have a long history in the general theory of relativity, are used in this paper to account for two of the most troubling aspects of Morris-Thorne wormhole…
Accounting for exotic matter and the extreme radial tension in Morris-Thorne wormholes of embedding class one
Peter K. F. Kuhfittig
The embedding of a curved spacetime in a higher-dimensional flat spacetime has continued to be a topic of interest in the general theory of relativity, as exemplified by the induce…