Extreme weights in Steinhaus triangles

Let {0=w0<w1<w2<…<wm0=w0<w1<w2<…<wm} be the set of weights of binary Steinhaus triangles of size n , and let Wibe the set of sequences in F2n that generate triangles of weight wi. In this paper we obtain the values of wi and the corresponding sets Wi for i¿{2,3,m}i¿{2,3,m}, and partial results for i=m-1i=m-1.Peer ReviewedPostprint (author's final draft

Alchemilla cuatrecasasii especie nueva.

4 p.[EN]Alchemilla cuatrecasasii a new species of Alchemilla genus included in series Vulgares Buser, subseries Hirsutae H. Lindb. is described from Central Pyrenees.[ES] Se describe una especie nueva del género Alchemilla de la series Vulgares Buser, subseries Hirsutae H. Lindb. procedente de los Prepirineos meridionales.Peer reviewe