Random triples
| Subject | Object |
|---|---|
| gptkb:QCD_vacuum_angle | gptkb:Peccei–Quinn_mechanism |
| gptkb:QCD_vacuum_angle | gptkb:axion |
| gptkb:QCD_theta_problem | Peccei-Quinn mechanism |
| gptkb:QCD_theta_problem | gptkb:axion |
| Subject | Object |
|---|---|
| gptkb:QCD_vacuum_angle | gptkb:Peccei–Quinn_mechanism |
| gptkb:QCD_vacuum_angle | gptkb:axion |
| gptkb:QCD_theta_problem | Peccei-Quinn mechanism |
| gptkb:QCD_theta_problem | gptkb:axion |