2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/50668I review the physical properties of different vacua in the background independent open string field theory. Talk presented at Strings 2001, Mumbai, India, http://theory.theory.tifr.res.in/strings/Proceedings/#sha-s.11 pages, 1 figureHigh Energy Physics - TheoryOn Field Theory of Open Strings, Tachyon Condensation and Closed Stringstext