Is magnitude 'generically continuous' for finite metric spaces?
Katsumasa, Hirokazu, Roff, Emily, Yoshinaga, Masahiko
Magnitude is a real-valued invariant of metric spaces which, in the finite setting, can be understood as recording the 'effective number of points' in a space as the scale of the metric varies. Motivated by applications in topological data analysis, this paper investigates the stability of magnitude: its continuity properties with respect to the Gromov-Hausdorff topology. We show that magnitude is nowhere continuous on the Gromov-Hausdorff space of finite metric spaces. Yet, we find evidence to suggest that it may be 'generically continuous', in the sense that generic Gromov-Hausdorff limits are preserved by magnitude. We make the case that, in fact, 'generic stability' is what matters for applicability.
Jan-15-2025
- Country:
- Europe > United Kingdom
- Scotland > City of Edinburgh
- Edinburgh (0.04)
- England > Cambridgeshire
- Cambridge (0.04)
- Scotland > City of Edinburgh
- Asia > Japan
- Honshū > Kansai > Osaka Prefecture > Osaka (0.04)
- Europe > United Kingdom
- Genre:
- Research Report (0.90)
- Technology: