"initially formulated" — Diccionario de colocaciones de inglés

initially formulated colocación
Automatic translation (No garantizamos su exactitud.): początkowo sformułować
  1. formulate verbo + initially adverbio
    Muy relajada/ suelta colocación

    (Each of the three equations that makes up this vector equation expresses the symmetry of the second spatial derivatives, which is how the condition was initially formulated.)