Recent content by martinbn

  1. martinbn

    I Spinorial Maxwell's equations

    Yes, the components are constant, so all the derivatives will be zero. In curved space-time you need the theorem that there is a unique connection with the given properties, one of which is that the ##\epsilon## has zero covariant derivative.
  2. martinbn

    I Lorentz metric on real type (1,0;1,0) tensors

    ##o ##o_A o^A=\epsilon_{BA}o^B o^A=0## The two form ##\epsilon## is antysymmetric. Everything is orthogonal to itself.
  3. martinbn

    I Black hole formation watched from a distance

    I meant that I understand the question to be about a generic formation of a black hole.
  4. martinbn

    A Center of a linear algebraic group

    Aren't the maximal abelian subgroups conjugate to the diagonal subgroup?
  5. martinbn

    I Black hole formation watched from a distance

    But it doesn't, because my question was "what are Schwarzschild coordinates for a black hole?", not just for the Schwarzschild black hole.
  6. martinbn

    I Black hole formation watched from a distance

    Is this for my question? The thread is about black hole formation. The Schwarzschild is eternal it cannot be relevant.
  7. martinbn

    I Black hole formation watched from a distance

    What are Schwarzshild coordinates?
  8. martinbn

    I Black hole formation watched from a distance

    Is there a reason why you expect that the answer shouldn't depend on what exacly the formation is, and on what time coordinate you use? Or do you have something more specific in mind?
  9. martinbn

    A Center of a linear algebraic group

    Of course, but it is a single point and has dimension 0.
  10. martinbn

    A Center of a linear algebraic group

    There are plenty of groups with trivial or finite centre, hence zero dimensional. So ##c(m)## can be zero for nonzero ##m##.
  11. martinbn

    A Assumptions of the Bell theorem

    Be careful you start to sound a lot like a crackpot. It is a slippery slope, once you go that way it is hard to go back. :wink:
  12. martinbn

    A Assumptions of the Bell theorem

    Not a prerequisite, but given that the other option is refuted by observation, it is the only possibility.
  13. martinbn

    A Assumptions of the Bell theorem

    The question shouldn't be about between what entities the influence is. It should be about what entity carries the influence. If you don't have a field that propagates, from one to the other, faster than light, then talking about FTL causal influences is a missleading choice of words.
  14. martinbn

    A Assumptions of the Bell theorem

    Let me guess. The two of you mean different things by FTL causal influences.
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