- #1

nomadreid

Gold Member

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"The properties of the event plane are described by the homogeneous two-dimensional Lorentz group L:

x' = xchθ + τshθ

τ' = xshθ + τchθ

where the hyperbolic angle θ is the transformation parameter. The relation of θ to the relativity velocity β is given by β = thθ. The coordinate τ = ct,..."

What are ch, sh, and th? Did he mean cosh, sinh, and tanh? Are his abbreviations standard?

Thanks.