Or "velocity of time".

Time is scalar (not a vector), right? Same as mass, work, temperature, etc.

Let's take a temperature, for example. It can be positive or negative. Is it a dimension? Can we move in temperature?

Now, replace t to -t in equations of motion, and you'll simply get motion in opposite direction. (Replace x to -x, and it is the same result. Just because v=dx/dt. Changing sign of EITHER x or t changes velocity sign.) So, from mathematical point of view motion "back in time" is the same as "back in space". Nothing unusual. Negative momentum of a photon (=attraction) instead of positive (repulsion). But is it indeed backward motion in time?

Try to define "motion through time" or "speed of time".

• I read it in a book... - smartguy - October 8, 2001 - 20:46 UTC
  • Perhaps Stephen Hawkings imaginary time idea.... - smartguy - October 8, 2001 - 21:10 UTC
  • Correction for Mark. - alexander - October 10, 2001 - 17:28 UTC
    • Miscomunication and interpretation, not a mistake on my behalf. - smartguy - October 10, 2001 - 18:46 UTC
      • Mark, universe behaves according to math, not vice versa. - alexander - October 10, 2001 - 20:16 UTC
        • I appologize for the remark I made... - smartguy - October 10, 2001 - 23:19 UTC
        • Oh yeah... - smartguy - October 10, 2001 - 23:28 UTC
      • You might find these useful.. - bruce - October 10, 2001 - 22:20 UTC
        • Thanx Bruce...(nt) - smartguy - October 10, 2001 - 22:39 UTC