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DOI：10.1093/bjps/axv009.png)
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Abstract
En 中文
Onone popular view, the general covariance of gravity implies that change is relational in a strong sense, such that all it is for a physical degree of freedom to change is for it to vary with regard to a second physical degree of freedom. At a quantum level, this view of change as relative variation leads to a fundamentally timeless formalism for quantum gravity. Here, we will show how one may avoid this acute 'problem of time'. Under our view, duration is still regarded as relative, but temporal succession is taken to be absolute. Following our approach, which is presented in more formal terms in (Gryb and The 'bault [2014]), it is possible to conceive of a genuinely dynamical theory of quantum gravity within which time, in a substantive sense, remains.
Keywords:
SCALE-INVARIANT GRAVITY
COMPLETE OBSERVABLES
NEWTONS SCHOLIUM
SYMMETRY
MOTION
PLACE
SPACE
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