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Every regularization scheme is somewhat arbitrary. There are three popular regularization schemes when it comes to path integrals and their associated perturbative divergent integrals: time slicing, mode regularization, and dimensional regularization. Time slicing is the usual procedure used to derive the path integral, and it is the discretization of time ...


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If there are eleven dimensions as M-Theory asserts Let us suppose it is true would that mean that the majority of what we are made from exists in the seven other dimensions? Define dimension: In physics and mathematics, the dimension of a mathematical space (or object) is informally defined as the minimum number of coordinates needed to ...


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A simplistic answer is, 3/11ths of us exists within the normal three dimensions, and the other 8/11ths exists in the hypothetical extra dimensions. This answer does make string theory sound silly (which personally I think it is :) , but i can't see why it should not be true.


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Depends on your view on "spacetime". In the classical view on space and time, time is completely independent from space, expressed e.g. in the Galilean transformations which transform space and time independently. https://en.wikipedia.org/wiki/Galilean_transformation Thus you can just visualize it as $\mathbb{R}^3$, which is not hard to sketch. In the ...


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Spacetimes with two spatial and one time dimension are known as 2+1D spacetimes, and there are lots of questions on this site about them. They are popular in quantum gravity studies because quantum gravity is a lot simpler in 2+1D. However the physics of 2+1D spacetimes is very different to our 3+1D spacetime. For example stable planetary orbits are only ...



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