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Equipollence (geometry)

In Euclidean geometry, equipollence is a binary relation between directed line segments. A line segment AB from point A to point B has the opposite direction to line segment BA. Two parallel line segments are equipollent when they have the same length and direction.

(1835) "Saggio di applicazioni di un nuovo metodo di Geometria Analitica (Calcolo delle equipollenze)", Annali delle Scienze del Regno Lombardo-Veneto, Padova 5: 244–59.

Giusto Bellavitis

Giusto Bellavitis (1854) , link from Google Books.

Sposizione del Metodo della Equipollenze