rbwinn wrote:
On May 6, 3:29�am, YBM wrote:
....
*you* have issues with the meaning of x,t,c,+/-c, etc.

Well, OK, show the issues. x is a coordinate on the x axis of set of
coordinates S, t is time in S, c= 186,000 miles per second, the speed
of light, +c =c, -c = -186,000 miles per second, meaning velocity in
the negative direction on an axis of a set of coordinates.

Ok, let's see, just below :

That is what I said. You cannot substitute x=ct into the equation for
t' if x is a negative coordinate.

Why ? x=ct is a valid equation of movement even for x0, LT are valid
for any x,y,z,t, making the substitution gives x'=ct' which is
consistent with RR's postulates, and is valid for any x', even negative.

There is NOTHING in any algebraic transformations I used that makes
a problem when x or t or x' or t' are negative...

Then I've shown you that x=ct (resp. x=-ct) and LT give without
any kind of problem : x'=ct' (resp. x=-ct) where c is the speed
of light.

Well, I do not know what you are saying here. I do not understand the
term, (resp. x= -ct)

resp. means respectively, so I hadn't to say twice (almost) the same
thing :

x=ct and LT implies x'=ct' (for any x,t)
x=-ct and LT implies x'=-ct' (for any x,t)

I have proven that the Lorentz equations are using
velocity of light, not just speed of light as scientists try to
claim.

I have now a terrible doubt. Are you suggestion that x=ct or
x=-ct ARE Lorentz equations ??

....
No, I said that you believe that the Lorentz equations are using speed
of light, not velocity of light. The velocity of light is preserved
in the equations in the spatial coordinates because of the equations

x=wt
x'=wt'
where w is the velocity of a photon.

I'm afraid it's true... Theses are not lorentz equations...

Einstein did not use these
coordinates. He used x=ct, x'=ct', which only did the job half way.

It doesn't, using special cases in the LT derivation doesn't meant that
the general case won't work at the end... Did you ever solve any kind
of identity at school ?

As a matter of fact you can plug in LT any equation of movement
like :

x=u*t + x0
y=v*t + y0
z=w*t + z0

velocity : (u,v,w), speed = sqrt(u^2+v^2+w^2) = c

Note that the case considered in classical LT derivation is
velocity (c,0,0), and that your fetish special case is
velocity (-c,0,0)

And you'll get by LT a equation of movement in S' satisfying speed = c.

Just do it.



[snip nonsense]