by jinydu » Tue Mar 28, 2006 4:44 am
I haven't heard of the term timespace, but I guess there's no reason why you couldn't rename "spacetime" as "timespace". There really isn't a difference anyway, since spacetime points are represented using a single 4-vector in special relativity.
Usually, in special relativity, spacetime vectors are represented in the form (ct, x, y, z). If you wanted, you could rewrite this in the form (x, y, z, ct). All you would have to do is change the order of the rows in all the Lorentz transformation matrices.