[FOM] why should we, in computer science, be excited about the possibility of speeds exceeding speed of light

[Kreinovich, Vladik]

This is absolutely correct. There are usual particles (like electrons and protons) which can travel with speeds smaller than speed of light, these particles cannot travel at speeds which are equal to or larger than the speed of light.

There are particles like photons which can travel at speed of light. These particles cannot travel slower or faster.

Finally, there are hypothetical tachyons, which can travel only faster than the speed of light, they cannot travel at the speed of light or slower than that. 

-----Original Message-----
From: Richard Heck [mailto:rgheck at brown.edu] 
Sent: Thursday, November 24, 2011 4:39 PM
To: Foundations of Mathematics
Cc: Kreinovich, Vladik
Subject: Re: [FOM] why should we, in computer science, be excited about the possibility of speeds exceeding speed of light

On 11/22/2011 08:43 PM, Kreinovich, Vladik wrote:
> Sorry for not explaining these details. Here is a brief description of why motions faster than speed of light lead to potential time travel. For details see Thorne's book that I mentioned in my original email. Thorne is one of the world leading astrophysicist and a good writer. 
>
The popular view of this I've often heard is: What's impossible is to
CROSS the barrier of the speed of light. There can be things slower;
there can be things faster. But nothing slower can become faster.
Perhaps you can tell me (us) to what extent this conforms to current theory.

Richard