As we know of GR, space and time are dependant on the frame of reference. In order to find an answer as to why this might be the case, I introduced the concept of variable durations in my ATM theory. What I'd like to know is if this concept is possible within the framework of GR.
This would mean that the amount of time that is measured by a second is not necessarily equal to the amount of time measured by another second. Obviously, it also means that the "amount of time" cannot be measured in seconds themselves, but rather in a number / second. I call this the concept of "stretcheable time" or "stretcheable seconds".
Again, just to clarify I'll repeat once more: the seconds themselves don't change, but rather the amount of time that "fits" in a second changes. This means that one second has a longer duration than another in a gravitational field and that changing from frame by switching to a different gravitational potential causes your seconds to become longer or shorter relative to the frames around it. You will still measure one second as a second in all frames of reference though, since that never changes.
In this sense, time dilation would be used to measure the ratio between two rates of time, but there would still be no way of measuring the actual "amount of time" that goes in a second. As you can see, I'm using "amount of time" in a context so that it becomes completely unrelated to the number of seconds though.
My apologies if this question is too ATM, but I'd really like to know if mainstream allows variable durations or not.