Maintenance work on the ZORA database servers is scheduled for Thursday 25th July 2019 from 19:00-20:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Hackbusch, W; Khoromskij, B; Sauter, S (2000). On H\sp 2-matrices. In: Bungartz, H J; Hoppe, R H W; Zenger, Ch. Lectures on applied mathematics (Munich, 1999). Berlin: Springer, 9-29.