1. On spherical four-point-spaces

   • Hiroshi Maehara

   OriginalPaper 26 March 2015 Pages: 1 - 8

2. Sets of type (q + 1, n) in PG(3, q)

   • Nicola Durante
   • Vito Napolitano
   • Domenico Olanda

   OriginalPaper 07 May 2015 Pages: 9 - 18

3. A constructive real projective plane

   • Mark Mandelkern

   OriginalPaper 27 May 2015 Pages: 19 - 60

4. Continuous flattening of truncated tetrahedra

   • Jin-ichi Itoh
   • Chie Nara

   OriginalPaper 27 May 2015 Pages: 61 - 75

5. Convexity without convex combinations

   • Mihály Bessenyei
   • Bella Popovics

   OriginalPaper 13 June 2015 Pages: 77 - 88

6. Upper bounds on the smallest size of a complete arc in a finite Desarguesian projective plane based on computer search

   • Daniele Bartoli
   • Alexander A. Davydov
   • Fernanda Pambianco

   OriginalPaper 16 June 2015 Pages: 89 - 117

7. A minimum blocking semioval in PG(2, 9)

   • Jeremy M. Dover
   • Keith E. Mellinger
   • Kenneth L. Wantz

   OriginalPaper 27 June 2015 Pages: 119 - 123

8. Holonomy and contact geometry

   • Philippe Rukimbira

   OriginalPaper 26 June 2015 Pages: 125 - 135

9. Inversion with respect to a hypercycle of a hyperbolic plane of positive curvature

   • Lyudmila N. Romakina

   OriginalPaper 07 July 2015 Pages: 137 - 149

10. Quantity of non-congruent struts in alternate division

    • Guy Grebot
    • Kevin Szczpanski

    OriginalPaper 07 July 2015 Pages: 151 - 168

11. Invariants of the k-fold adjoint action of the Euclidean isometry group

    • Mohammed Daher
    • Peter Donelan

    OriginalPaper 14 July 2015 Pages: 169 - 185

12. Construction of hyperbolic Riemann surfaces with large systoles

    • Hugo Akrout
    • Bjoern Muetzel

    OriginalPaper 20 August 2015 Pages: 187 - 205

13. An axiomatic system for affine spaces in terms of points, lines, and planes

    • Walter Wenzel

    OriginalPaper 15 October 2015 Pages: 207 - 216