'Fog's rollin' in off the East River bank,
Like a shroud it covers Bleeker Street,
Fills the alleys where men sleep,
Hides the shepherd from the sheep.'
domingo, 20 de maio de 2018
On tetrads
On the Hamiltonian formalism of the tetrad-gravity with fermions.
http://link.springer.com/10.1007/s10714-018-2386-0
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