6th Dimensions in a 3 Dimensional universe

Kathie7
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Is it possible for an object with 6 dimensions to exist in a three dimensional universe?
 
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Is it possible for a sphere to exist embedded in a plane?
 
Of course it's not, if it it was what would it look like?
 
Of course!
 
Isn't this probably a question about Calabi-Yau spaces, by someone trying to understand what extra dimensions mean?
 

Thread 'Gravitational self-interaction: another attempt to replace Dark Matter'

https://arxiv.org/pdf/2503.09804 From the abstract: ... Our derivation uses both EE and the Newtonian approximation of EE in Part I, to describe semi-classically in Part II the advection of DM, created at the level of the universe, into galaxies and clusters thereof. This advection happens proportional with their own classically generated gravitational field g, due to self-interaction of the gravitational field. It is based on the universal formula ρD =λgg′2 for the densityρ D of DM...
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