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Greg Egan has written a series called Orthogonal which explores a universe that contains different rules for the time dimension than ours. http://www.gregegan.

• untoxicness 5y ago
  Another book by Greg Egan exploring different metrics of spacetime is Dichronauts. In Orthogonal the metric signature explored is (+,+,+,+). In Dicronauts the metric signature explored is (-,-,+,+). (We live in a universe with metric signature (-,+,+,+).) http://gregegan.net/DICHRONAUTS/DICHRONAUTS.html http://gregegan.net/DICHRONAUTS/DICHRONAUTS.html
  • snarfy 5y ago
    What would the difference between (-,+,+,+) and (+,-,-,-) be? It seems like they are the same except for choice of labels. I guess the main difference is where speed of light fits in. In (-,+,+,+) the - is multiplied by c.
    • untoxicness 5y ago
      You are right, there is no difference. As a matter of fact, many physicists work with a signature of (+,-,-,-) to describe the spacetime of our universe. https://en.wikipedia.org/wiki/Sign_convention#Relativity https://en.wikipedia.org/wiki/Sign_convention#Relativity
• choxi 5y ago
  I'm most of the way through Diaspora where he invents a new theory of physics to drive the plot, he also elaborates on some existing theories and their philosophical implications to an advanced civilization. It's great, definitely recommend it.