The concept of Schreier extensions of loops was introduced in the general case in [11] and,
more recently, it has been explored in the context of Steiner loops in [6]. In the latter case, it …

Steiner triple systems (STSs) have been classified up to order 19. Earlier estimations of the
number of isomorphism classes of STSs of order 21, the smallest open case, are …

The smallest open case for classifying Steiner triple systems is order 21. A Steiner triple
system of order 21, an STS\((21)\), can have subsystems of orders 7 and 9, and it is known …

As of now, a general extension theory for loops still does not exist. The lack of associativity
makes the situation less controllable and very different from the theory of group extensions …

A Steiner triple system (STS) contains a transversal subdesign TD (3, w) if its point set has
three pairwise disjoint subsets A, B, C of size w and w 2 blocks of the STS intersect with …

We give a new perspective of the relationship between simple matroids of rank 3 and
pairwise balanced designs, connecting Wilson's theorems and tools with the theory of …

We give a new perspective of the relationship between simple matroids of rank 3 and
pairwise balanced designs, connecting Wilson's theorems and tools with the theory of …

Система троек Штейнера (STS) содержит трансверсальный поддизайн TD (3, w), если
в множестве ее точек имеются три попарно непересекающихся подмножества A, B, C …

The smallest open case for classifying Steiner triple systems is order 21. A Steiner triple
system of order 21, an STS (21), can have subsystems of orders 7 and 9, and it is known that …

Una batería es un dispositivo formado por una o varias celdas electroquímicas capaces de
convertir la energía química almacenada en energía eléctrica. Cada celda cuenta con dos …