The Ã°0; aÃž-geometries fully embedded in a projective space are up to a few open cases classified. For Ã°0; aÃž-geometries fully embedded in an affine space AGÃ°n; qÃž, less is known. The most importantâ€¦ (More)

De Clerck, F. and N.L. Johnson, Subplane covered nets and semipartial geometries, Discrete Mathematics 106/107 (1992) 127-134. Using the characterization theorems for (semi)partiaI geometries whichâ€¦ (More)

A (finite) partial geometry S = (P, B, I) is an incidence structure with a symmetric incidence relation satisfying the following axioms. (i) Each point is incident with t + 1lines (t;;?; 1) and twoâ€¦ (More)

The shortened fallow period in traditional slash and burn agriculture of the Maya of Quintana Roo, Mexico, has reduced soil fertility, crop yields, biodiversity, and mature forest vegetation. Studiesâ€¦ (More)

We extend some of the theory of flocks of a finite quadratic cone to the infinite case and give some examples. One of the results we prove is that a generalized quadrangle is coming from a flock ifâ€¦ (More)

The point-line geometry known as a partial quadrangle (introduced by Cameron in 1975) has the property that for every point/line non-incident pair (P, `), there is at most one line through Pâ€¦ (More)