hasEventHorizon
P4449
predicate
Indicates that an object possesses an event horizon, a boundary beyond which events cannot affect an outside observer.
All labels observed (4)
| Label | Occurrences |
|---|---|
| hasEventHorizon canonical | 5 |
| hasHorizonStructure | 5 |
| eventHorizonRadiusSymbol | 1 |
| hasOuterHorizonRadius | 1 |
Description generation (PDg)
The one-sentence description above was generated by prompting gpt-5.1 with the predicate name and this instruction.
Instruction
Given a predicate that represents a relationship or action between entities, generate a one-sentence description explaining its meaning. # Instructions Focus on describing the relationship, not the entities themselves. # Response Format Begin the description with \' Indicates...\'
Input
Predicate: hasEventHorizon
Generated description
Indicates that an object possesses an event horizon, a boundary beyond which events cannot affect an outside observer.
Sample triples (12)
| Subject | Object |
|---|---|
| Schwarzschild black hole | Schwarzschild radius ⓘ |
| de Sitter spacetime | cosmological horizon ⓘ |
| Eddington–Finkelstein coordinates | r = 2M via predicate surface "eventHorizonRadiusSymbol" ⓘ |
| Reissner–Nordström metric | r_+ = M + \sqrt{M^2 - Q^2} via predicate surface "hasOuterHorizonRadius" ⓘ |
| Reissner–Nordström metric | at r = r_+ for |Q| \le M ⓘ |
| Bardeen black hole model | can have two horizons via predicate surface "hasHorizonStructure" ⓘ |
| Bardeen black hole model | can have an extremal horizon via predicate surface "hasHorizonStructure" ⓘ |
| Bardeen black hole model | can have no horizon depending on parameters via predicate surface "hasHorizonStructure" ⓘ |
| Kerr–Newman black hole | outer event horizon ⓘ |
| Kerr–Newman black hole | inner Cauchy horizon ⓘ |
| Hayward black hole model | can admit event horizon via predicate surface "hasHorizonStructure" ⓘ |
| Hayward black hole model | can admit inner (Cauchy) horizon via predicate surface "hasHorizonStructure" ⓘ |