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  1. Boing3000
    Boing3000 liked post by lpetrich On thread : Alternate theories of gravity?
    The Confrontation between General Relativity and Experiment (http://relativity.livingreviews.org/Articles/lrr-2014-4/) Alternatives to general relativity - Wikipedia, the free encyclopedia...
    Liked On: 09-29-2014, 11:47 AM
  2. Jilan
    Jilan liked post by lpetrich On thread : Dirac and Anderson
    If some galaxies are made of antimatter, then there would be separate ordinary-matter and antimatter regions of the Universe, and their boundaries would produce characteristic annihilation radiation,...
    Liked On: 09-16-2014, 05:21 AM
  3. x0x
    x0x liked post by lpetrich On thread : Alternate theories of gravity?
    The Confrontation between General Relativity and Experiment (http://relativity.livingreviews.org/Articles/lrr-2014-4/) Alternatives to general relativity - Wikipedia, the free encyclopedia...
    Liked On: 09-12-2014, 12:19 AM
  4. x0x
    x0x liked post by lpetrich On thread : How can 299792458 m/s be different to 299792458 m/s ?
    Show us how to calculate it in general. Repeating some specific solution does NOT count. That is ONE solution with ONE coordinate system and with ONE set of observers. I'm VERY disappointed. ...
    Liked On: 09-06-2014, 10:56 PM
  5. x0x
    x0x liked post by lpetrich On thread : Is Negative energy real?
    Negative energy? Consider the Penrose process (Wikipedia) (https://en.wikipedia.org/wiki/Penrose_process). So a particle traveling in a Kerr black hole's ergosphere can have negative energy as...
    Liked On: 08-15-2014, 04:56 PM
  6. x0x
    x0x liked post by lpetrich On thread : How come Light can not escape a Black hole
    It is certainly a sight to see, Farsight denying Einstein. But that aside, I will turn to my main business. I think that the OP's question can be expressed as follows: Can an ingoing particle emit...
    Liked On: 08-15-2014, 02:44 PM
  7. johnzxcv
    johnzxcv liked post by lpetrich On thread : Why does time only have one direction?
    Continuing further, we can classify metric spaces, spaces with distance measures. If the metric has all the same sign of signature, then the space is called a Euclidean one, after that famous...
    Liked On: 08-15-2014, 02:38 PM
  8. x0x
    x0x liked post by lpetrich On thread : The God's eye global gist of general relativity
    Argument by book-thumping is very worthy of "Personal Theories and Alternative Hypothesis". That's not a problem for mainstream GR.
    Liked On: 08-08-2014, 10:02 PM
  9. number8
    number8 liked post by lpetrich On thread : The Standard Model: where are we now?
    (Einstein-thumping snipped) Except that quarks have nonzero baryon number B. Ordinary ones have B = 1/3, while antiquarks have B = -1/3. So a quark-gluon plasma does not violate baryon number,...
    Liked On: 08-02-2014, 08:32 AM
  10. number8
    number8 liked post by lpetrich On thread : The Standard Model: where are we now?
    There's a further problem with the Standard Model. Its rather sizable number of free parameters: 19. This is in addition to its rather complicated gauge-multiplet structure and symmetry group, SU(3)...
    Liked On: 08-02-2014, 08:32 AM
  11. number8
    number8 liked post by lpetrich On thread : The Standard Model: where are we now?
    (Me: Gravity. It's hard to quantize, and it's hard to connect it to the Standard Model.) It is not, and how many times must we explain that to you? (Me: Matter/antimatter asymmetry. It requires...
    Liked On: 08-02-2014, 08:32 AM
  12. Boing3000
    Boing3000 liked post by lpetrich On thread : Symmetries of Space-time
    I'm judging from your claim that I deny Einstein when I reject your interpretations of some of what he had stated, and how you treat general relativity as a religious revelation by Einstein rather...
    Liked On: 07-31-2014, 07:24 AM
  13. x0x
    x0x liked post by lpetrich On thread : Symmetries of Space-time
    Henri Poincaré - Wikisource (https://en.wikisource.org/wiki/Author:Henri_Poincar%C3%A9): On the Dynamics of the Electron (July) - Wikisource...
    Liked On: 07-30-2014, 03:17 PM
  14. Boing3000
    Boing3000 liked post by lpetrich On thread : Symmetries of Space-time
    So vision is epistemologically primary. A serious philosopher would laugh at you, Farsight. Laugh and laugh and laugh very hard at you. Does that mean that clouds are solid objects? That rainbows...
    Liked On: 07-30-2014, 02:58 PM
  15. x0x
    x0x liked post by lpetrich On thread : Symmetries of Space-time
    I'll now discuss Killing tensors and Killing-Yano tensors a bit more. I've found [gr-qc/0212016] Killing Tensors from Conformal Killing Vectors (http://arxiv.org/abs/gr-qc/0212016) [1406.3069]...
    Liked On: 07-29-2014, 02:25 PM
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