Geodesic
A Summability Problem
Canadian mathematical bulletin, Tome 23 (1980) no. 4, pp. 421-424

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In a paper by Wilansky and the writer [4] there were five questions left open, four of which have been answered by Beekman and the writer, [1], [3]. We shall consider the fifth one, namely, “If , must for every matrix D with cD = cA?” Here A is a conservative summability matrix with column limits . 
Macphail, M. S. A Summability Problem. Canadian mathematical bulletin, Tome 23 (1980) no. 4, pp. 421-424. doi: 10.4153/CMB-1980-061-1
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