A linear worst-case lower bound on the number of holes inside regions visible due to multiple diffuse reflections Siddhartha BrahmaSudebkumar Prasant PalDilip Sarkar Original Paper Pages: 5 - 14
Analogues of the nine-point circle for orthocentric n-simplexes Małgorzata Buba-Brzozowa Original Paper Pages: 21 - 29
The classification of spreads in PG(3, q) admitting linear groups of order q(q+1), I. odd order Vikram JhaNorman L. Johnson Original Paper Pages: 46 - 80
Surfaces of revolution in the 3-dimensional Lorentz-Minkowski space satisfying \( \Delta ^{{II}} \ifmmode\expandafter\vec\else\expandafter\vecabove\fi{r} = A\ifmmode\expandafter\vec\else\expandafter\vecabove\fi{r} \) George KaimakamisBassil Papantoniou Original Paper Pages: 81 - 92
Realizing a singular first fundamental form as a nonimmersed surface in Euclidean 3-space Marek Kossowski Original Paper Pages: 101 - 113
An axiom system for Lingenberg’s metric-Euclidean planes Victor Pambuccian Original Paper Pages: 139 - 143
Projectivities between bundles of plane higher order curves Charles Thas Original Paper Pages: 168 - 179
