Dan Horia Constantinescu was born in 1940 in Sighișoara (Romania) as the only child of Liviu Constantinescu, geophysicist, and his wife Sofia (née Stoicoviciu), philologist.
After completing secondary school in Bucharest, he enrolled at the University of Bucharest (1957) and received a Master Degree in Physics (Diplomat universitar în specialitatea fizică generală) upon submitting the dissertation "The Jost-Lehmann-Dyson theorem and the proof of dispersion relations" (1962). After several years as teaching assistant at his alma mater, he started graduate studies at Scuola Normale Superiore di Pisa (1970) and earned a Doctor Degree in Physics (Diploma di perfezionamento in fisica) upon defending the thesis "Matter and radiation in superstrong magnetic fields" (1973).
In 1974 he settled in Germany and married Ruxandra Sireteanu, biophysicist. They have two children: Laura and Sorin.
DHC worked as theoretical physicist at Heidelberg University, Scuola Normale Superiore di Pisa, European Southern Observatory, Max Planck Institute for Astrophysics, University of Erlangen-Nürnberg.
- Ș. Țițeica, D. H. Constantinescu and V. Florescu: Representation of infinitesimal orthogonal groups by infinitesimal canonical transformations, Revue Roumaine de Physique, 11 (9-10), 853-868 (1966).
- D. H. Constantinescu and M. Gavrilă: Coherent scattering of light by atomic hydrogen, Revue Roumaine de Physique, 12 (2), 121-127 (1967).
- D. H. Constantinescu: Vacuum polarization in magnetic field, Nuclear Physics, B36, 121-129 (1972).
- D. H. Constantinescu: Electron self-energy in a magnetic field, Nuclear Physics, B44, 288-300 (1972).
- D. H. Constantinescu and P. Rehák: Ground state of atoms and molecules in a superstrong magnetic field, Physical Review D, 8 (6), 1693-1706 (1973).
- B. Banerjee, D. H. Constantinescu and P. Rehák: Thomas-Fermi and Thomas-Fermi-Dirac calculations for atoms in a very strong magnetic field, Physical Review D, 10 (8), 2384-2395 (1974).
- Dan H. Constantinescu and Pavel Rehák: Equation of state for condensed matter in a very strong magnetic field, Annals of the New York Academy of Sciences, 257, 85-94 (1975).
- D. H. Constantinescu and G. Moruzzi: Thermodynamics of the statistical model of atoms in a very strong magnetic field: an approach to the properties of condensed matter in the outer crust of pulsars, Physical Review D, 18 (6), 1820-1828 (1978).
- D. H. Constantinescu, L. Michel and L. A. Radicati: Spontaneous symmetry breaking and bifurcations from the Maclaurin and Jacobi ellipsoids, Journal de Physique, 40, 147-159 (1979).
- Dan H. Constantinescu: The Wigner transition as a bifurcation, Physics Letters, 73A (2), 84-86 (1979).
- Dan H. Constantinescu: Bifurcation-theory approach to electron solids in superstrong magnetic fields, Physical Review Letters, 43 (17), 1267-1270 (1979).
- D. H. Constantinescu: Bifurcations and symmetry breaking: selection rules, Zeitschrift für Angewandte Mathematik und Mechanik, 60, T245-T247 (1980).
- Dan H. Constantinescu: Nondegenerate electron solids, Physics Letters, 75A (3), 205-207 (1980).
- Dan H. Constantinescu: Electron crystallization and bifurcation theory, Physics Letters, 85A (1), 45-47 (1981).