Monotonic decay of persistence-diagram strength

Determine whether the L1-norm of the persistence diagram of V_p is always no larger than that of V_q for every pair of parameters 1≤p≤q, equivalently whether the combined strength of the equilibria monotonically decreases as the parameter increases.

Background

The paper disproves a monotonicity conjecture concerning the number of equilibria of the parameterized potentials V_p by exhibiting a configuration for which V_1 has more index-1 equilibria than V_p for sufficiently large p.

The authors propose a weaker question based on persistence diagrams: although the number of equilibria may increase, their aggregate persistence strength might still decrease monotonically with the parameter.

References

Is the $L_1$-norm of the persistence diagram of $V_p$ always smaller than that of $V_q$ for any $1 \leq p \leq q$? In other words, does the combined ``strength'' of the equilibria monotonically decrease with shrinking parameter, $p$?

Counting Equilibria of the Electrostatic Potential  (2501.05315 - Edelsbrunner et al., 9 Jan 2025) in Discussion, Section 7