On Peirce’s 1878 article ‘The probability of induction’: a conceptualistic appraisal G. A. Kyriazis OriginalPaper 28 July 2020 Pages: 1 - 20
Maurice Janet’s algorithms on systems of linear partial differential equations Kenji IoharaPhilippe Malbos OriginalPaper 10 August 2020 Pages: 43 - 81
An unpublished manuscript of John von Neumann on shock waves in boostered detonations: historical context and mathematical analysis Molly Riley KnoedlerJulianna C. KostasChad M. Topaz OriginalPaper Open access 18 August 2020 Pages: 83 - 108
Before the end of an error: Giovanni Bianchini’s original flawed treatise on the conversion of stellar coordinates Glen Van Brummelen OriginalPaper 24 September 2020 Pages: 109 - 124