Operation of weaving partial Steiner triple systems
  We introduce an operation of a kind of product which associates with a partial Steiner triple system another partial Steiner triple system, the starting one being a quotient of the result. We discuss relations of our product to some other product-like constructions and prove some preservation/non-preservation theorems. In particular, we show series of anti-Pasch Steiner triple systems which are obtained that way. 
Ma{\l}gorzata Pra\.zmowska, Krzysztof Pra\.zmowski
math.CO