Is another form of time one of the extra dimensions?

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SUMMARY

Time is established as the fourth dimension in conventional space-time, with the three spatial dimensions comprising the other components. String Theory proposes additional spatial dimensions, but lacks empirical evidence for their existence. In F-Theory, which suggests a total of 12 dimensions, one of these dimensions is interpreted as an alternative form of time. This interpretation is unique to F-Theory and does not extend to other string theory frameworks.

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LinJieFu
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Sorry. I know I must sound like a hick. Time is ... the 4th dimension of our conventional reference? If so, are one or more of the other dimensions posited by String Theory considered possibly to be an additional time dimension(s)?
 
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Yes, time is one of the 4 "normal" dimensions of space-time, with space being the other 3.

The extra dimensions posited by string theory are all spatial dimensions but there is no evidence that they exist.
 
Only in F-Theory (total of 12 dimensions) there is an technical interpretation of one (and only one) of the extra dimensions as another form of time.
 

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