universe - Is time finite or infinite? - Astronomy Stack Exchange
2022年7月19日 · If space is indeed infinite, and the universe is homogenous and isotropic, then the total mass-energy of the universe could be infinite. However the potential gravitational energy might be negative infinite, and so the total energy of the universe might be zero, leading to Hawking's observation that "the universe is the ultimate free lunch".
time - Finite and infinite temporal duration - Philosophy Stack …
2023年1月10日 · Actually sempiternal, or actual infinite temporal duration: there is time but it has neither beginning or end (as per Aristotle). Potentially sempiternal, or potential infinite temporal duration: there is time and it has a beginning but has no end; the temporal duration from the beginning to now is always finite, but the infinite addition of ...
infinity - Isn’t the impossibility of an actual infinite in time almost ...
2023年11月20日 · Alternatively put: either time is finite or infinite, or time is neither finite nor infinite, or it's both. I'm not of a mind to countenance the dialethic option that much (I tend to interpret the dialethic theory of truth as involving, at best, something like a self-dual truth-value), so I would settle on (using a bit of Gödel-speak):
metaphysics - Is "time" an abstract mental construct or does it …
(1) Time extends infinitely into the past: ¬∃ i ∈ Z ( ∀ j∈ Z ( i ≤ j ) ). Now, while this means that an infinite period of time precedes the present moment, we still have it that: (2) The present exists: ∃ i ∈ Z: i = 0. Usually rational or real numbers are used to model time, but this model is sufficient for our purposes.
time - If the past is infinite, then I couldn't have reached the ...
2024年3月18日 · Infinity is not a number. It's a process. As long as time continues in a forward direction the "present" is not a fixed number and the "distance" from past to present is not fixed but is always increasing. This is how time can be described as infinite. Even if the past began at zero, time (the present) continues to increase in an unending process.
Is it possible that we are stuck in a loop of endless life?
2018年6月18日 · But the 'infinite number of chances' does not entail that your precise replaca will or does exist at the same time as you; and no replica of you actually is you. One possibility is, however, that the materials of which you consist are reconstituted in another universe, so that you are literally re-created.
time - Infinite past with a beginning? - Philosophy Stack Exchange
2019年4月7日 · Aristotle said the past is infinite because, for any past time we can imagine an earlier one. Aristotle's arguments aside, this is what people mean when they speak of an infinite past: for any time x, there exists another time y such that y precedes x. Colloquially, "there is no first moment in time".
Would it be logically possible that the Universe has a beginning in ...
2020年3月22日 · The bit about infinite observers seems odd, although I know there models of a Big Crunch with infinite oscillations in finite time, and Conformal Cyclic Cosmology seems to point at a literal infinity of time after a big bang and it 'settling' into a state topologically equivalent to the big bang - that won't allow infinite future agents, and I ...
How can time have a beginning when a beginning needs time?
2021年6月18日 · With time, it is similar, but the opposite: the proper time is finite as the world lines of all objects end in the past at Big Bang singularity. At the same time, the global, coordinate time is infinite in the past. The speed of time depends on the density of mass-energy. Near massive objects the time is slowed down.
philosophy of science - If time is going to end, then did it have a ...
2018年7月28日 · But the nature of time is an open question. Given that general relativity, the theory of gravity and time, needs to be reconciled with quantum field theory, it's very likely that will shift our understanding of space-time, probably to seeing it as emergent from a wider event space. Scientists don't do proofs. They do evidence.