o-Phenyl­enediammonium bis­(3-carb­oxy-4-hydroxy­benzene­sulfonate)

In the title salt, C6H10N2 2+·2C7H5O6S−, the negative charge of the anion resides on the sulfonate group. In the crystal, the cations and anions are ­linked by N—H⋯O and O—H⋯O hydrogen bonds, forming a three-dimensional network. The complete dication is generated by crystallographic twofold symmetry

Ruin probability in the Cramér–Lundberg model with risky investments

AbstractWe consider the Cramér–Lundberg model with investments in an asset with large volatility, where the premium rate is a bounded nonnegative random function ct and the price of the invested risk asset follows a geometric Brownian motion with drift a and volatility σ>0. It is proved by Pergamenshchikov and Zeitouny that the probability of ruin, ψ(u), is equal to 1, for any initial endowment u≥0, if ρ≔2a/σ2≤1 and the distribution of claim size has an unbounded support. In this paper, we prove that ψ(u)=1 if ρ≤1 without any assumption on the positive claim size