Overview of Defense du calcul des Differences (1702)

Overview of Justification du Calcul des infinitésimales par celuy de l’Algèbre ordinaire (1702)

There are three versions of the text we present: the manuscripts LBr. 951, Bl. 14, LBr. 951, Bl. 12-13, LBr. 951 Bl. 15-16. The last one has already been edited by Gerhardt [GM IV, 104-106]. We will offer soon a new transcription integrating the variants which seem significant to us.

Overview of Qvelques remarques sur les Memoires de Trevoux de l'an 1701 (1702)

Overview of Puisque des personnes que j’estime beaucoup (1705)

This manuscript is a shortened French version of Sentiment de Monsieur Leibnitz (available here). It was probably intended for the Parisian savants (the other, in Latin, being reserved for publication in the Acta Eruditorum).

Overview of Elemens du calcul

Overview of Specimen Analyseos Figuratae in Elementis Geometriae (1683)

Overview of Ars Representatoria (1691)

Overview of Auxilia Calculi ex Ductu Linearum (1680 – 1716)

Overview of Trigonometria Sphaerica Tractanda per Projectionem in Plano (1679 – 1680)

This manuscript doesn’t concerns directly perspective, but it deals with the projection of a part of a sphere on a plane. However, by doing so Leibniz utilizes a similar method to that of perspective and we believe it could be the key to understand how curves and curved planes are represented in perspective, something that Leibniz always says it is possible to achieve but that he never shows in practice in the manuscripts.

Overview of Punctorum Relatio ad Planum Spectatoris (1684 – 1687)