The "Algorismus demonstratus" is a spurious attribution although for a long time this item was ascribed to Jordanus. Up until Eneström began to sort out the various treatises, the "Algorismus demonstratus" – since it was the only one published (ed. Johannes Schöner, Nuremberg, 1543) – was the heading under which all the treatises were grouped. Eneström thought it highly unlikely, however, that this version was the work of Jordanus since no manuscript ascribes it to him (if they give an author, it is generally a Magister Gernarus, or Gerhardus or Gernandus). The first part of this treatise (also known as the "Algorismus de integris") contains definitions, axioms and 43 propositions. The second part (the "Algorismus de minutiis") contains definitions and 42 propositions. Eneström shows that while different from the algorismi treatises of Jordanus, the "Algorismus demonstratus" is still closely related to them.