\[http://wiki.apache.org/hama-data/attachments/Atricles/attachments/UnderstandOfLinearAlgebra.pdf An Introduction to linear algebra\] by Edward J. Yoon, April 18, 2008unmigrated-wiki-markup\[http://wiki.apache.org/hama-data/attachmentsWiki Markup - /Presentations/attachments/BigTable_and_Hbase.pdf BigTable & Hbase\] by Edward J. Yoon, October 1, 2008 @ KAIST