Recent content by timur

My knowledge in this field is limited but there are all sorts of quantum gravity theories that choose different variables as "basic" quantities. As for the relation between spin and Christoffel connections, you can think of the Christoffel connection as the connection on an associated bundle...

Having a pair of ears that are ready to listen to you (or your nonsense sometimes) is good.

You try to construct a continuous (and nonconstant) function from [0,1] to {-1,1}.

My point is that you cannot have continuous (nontrivial) spatial dependence with discrete groups. The lattice gauge theory above mentioned is not a theory with discrete gauge group, rather it is a theory with discrete spacetime.

C plus plus

That is remarkable!

If I understood your question correctly, you cannot "gauge" discrete groups because your want the gauge to be continuous and the only continuous function (whatever that means) having values from a discrete group on a connected space is a constant function, so it is just same as having "global...

I heard that something like 3000 neutrons would make a stable nucleus.

Start with basic differential geometry, matrix Lie groups etc.

In any case publication is not a must.

I don't get your point. I mean, who would expect publications from an undergrad student who is applying for a grad program?

If you are an undergrad student planning to go for grad study, publication is not important. Just do research without insisting on publication and get experience, you will get a strong recommendation letter. If your research is good your professor will suggest you to publish anyways.

People will give better answers than mine, but it should depend on what you want to do with your degree after graduation. For instance if you want to do actual computation and so a lot of programming, a CS minor would be good. But if you want to do research in applied math, like designing or...

If I understood correctly, Penrose says that in QM wave function collapse there is no undeterminism is going on, it is just a way the information disappeared in black holes showing up again. So it seems that for him the information loss is important and the theory (if there is any) is...

When you move points around you also have to 'bring' the geometry along with you, so everything is ok. It just means that there is no absolute location (or the absolute coordinate system) in spacetime. Suppose the spacetime is a plane, and suppose you have chosen some coordinate system on this...