I What is time in string/M-theory and Four-dimensionalism?

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In string theory, time is considered as one dimension within a ten-dimensional framework, comprising nine spatial dimensions and one time dimension. M-theory expands this to eleven dimensions, maintaining a single time dimension alongside ten spatial dimensions. The discussion explores how the concepts of three-dimensionalism versus four-dimensionalism relate to these theories, particularly in the context of our experience of four-dimensional spacetime in general relativity. The additional six or seven dimensions proposed by string and M-theory are primarily for mathematical consistency and remain unobserved in experiments. Overall, the nature of time in these theories raises complex questions about the fundamental structure of reality.
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TL;DR Summary
concept of time
what is time according to string/M-theory

do objects in string theory also have temporal parts?

and how does the debate of Three vs Four-dimensionalism apply to string theory which posits 10/11 dimensions?
 
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What we experience as three spatial dimensions plus time, is the four dimensional spacetime of GR.
kodama said:
what is time according to string/M-theory
do objects in string theory also have temporal parts?
In string theory, spacetime is ten-dimensional (nine spatial dimensions, and one time dimension). In M-theory, spacetime is eleven-dimensional (ten spatial dimensions, and one time dimension).

kodama said:
... and how does the debate of Three vs Four-dimensionalism apply to string theory which posits 10/11 dimensions?
The extra 6/7 dimensions are hypothesised for mathematical consistency, and are not observed in experiments.
 

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