My Erdős number: 3

The Erdős number describes the collaborative distance between mathematician Paul Erdős and another person, as measured by authorship of mathematical papers. Here's my connection:

1. Åke Edlund → A. Nitzan

U. Peskin, Å. Edlund, I. Bar-On, M. Galperin & A. Nitzan,
Transient Resonance Structures in Electron Tunneling Through Water,
J. Chem. Phys. 111, 7558–7566 (1999)

2. A. Nitzan → Peter Salamon

B. Andresen, R. S. Berry, A. Nitzan & P. Salamon,
Thermodynamics in Finite Time I: The Step Carnot Cycle,
Phys. Rev. A 15, 2086–2093 (1977)

3. Peter Salamon → Paul Erdős

P. Salamon & P. Erdős,
The Solution to a Problem of Grünbaum,
Canadian Math. Bulletin 31, 129–138 (1988)