Leck, Uwe; Roberts, Ian T.; Simpson, Jamie Minimizing the weight of the union-closure of families of two-sets. (English) Zbl 1251.05176 Australas. J. Comb. 52, 67-73 (2012). MSC: 05D05 × Cite Format Result Cite Review PDF
Diarra, Bertin An operator on some ultrametric Hilbert spaces. (English) Zbl 0930.47049 J. Anal. 6, 55-74 (1998). Reviewer: T.D.Narang (Amritsar) MSC: 47S10 47A75 × Cite Format Result Cite Review PDF