Research in History and Philosophy of Mathematics

1. Bolzano Against Kant’s Pure Intuition
Paul Anh McEldowney

2. Poincaré on the Foundation of Geometry in the Understanding
Jeremy Shipley

3. Natural Deduction for Diagonal Operators
Fabio Lampert

4. What is a Symbol?
Valerie Allen

5. Polar Ordinates in Bernoulli and L’Hôpital
Robert E. Bradley

6. Magic Squares of Subtraction of Adam Adamandy Kochański
Henryk Fukś

7. Euler’s E228: Primality Testing and Factoring via Sums of Squares
V. Rickey

8. “A Most Elegant Property”: On the Early History of Lexell’s Theorem
Eisso J. Atzema

9. The Misnamings of Playfair’s Axiom
Amy Ackerberg-Hastings

10. Napier, Torporley, Menelaus, and Ptolemy: Delambre and De Morgan’s Observations on Seventeenth-Century Restructuring of Spherical Trigonometry
Joel S. Silverberg

11. The Reception of American Mathematics Education in Soviet Pedagogical Journals of the 1960s and 1970s
Mariya Boyko

12. Mathematics in Library Subject Classification Systems
Craig Fraser

13. The Convolution as a Mathematical Object
Roger Godard

14. Sundials–Une Promenade Parisienne (A Math Walk in Paris)
George Heine

Keywords: Mathematics, History of Mathematical Sciences, Philosophy of Mathematics