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the claim
Past null infinity represents the boundary reached by incoming light-like rays in asymptotically flat spacetime
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
3 sources for · 0 against

Past null infinity represents the boundary reached by incoming light-like rays in asymptotically flat spacetime according to the standard conformal compactification framework in general relativity.

Evidence for · 3
Null infinity as a weakly isolated horizon
2024 · cited by 21
Null infinity arises as a boundary of the Penrose conformal completion of an asymptotically flat physical space-time, capturing incoming and outgoing light-like rays.
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The analysis

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More for · 2
Calculation of asymptotic charges at the critical sets of null infinity.
2024 · cited by 2
Null infinity is divided into two sets: past null infinity and future null infinity, which serve as boundaries for incoming and outgoing null trajectories.
Conformal compactification and affine-null metric formulation of the Einstein equations
2025 · cited by 1
Conformal compactification allows a clean definition of the infinities of General Relativity, including null infinity where light-like rays reach the boundary.
Everything we examined (3)
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  1. Null infinity as a weakly isolated horizonpeer-reviewedsupports
  2. Calculation of asymptotic charges at the critical sets of null infinity.peer-reviewedsupports
  3. Conformal compactification and affine-null metric formulation of the Einstein equationspeer-reviewedsupports
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first checked06 Aug 2026
judged → SUPPORTED · 8406 Aug 2026
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