<http://webisa.webdatacommons.org/prov/516248543>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/351882926> .
<http://webisa.webdatacommons.org/351882926>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<nag.co.uk> .
<http://webisa.webdatacommons.org/351882926>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/351882926>	<http://www.w3.org/ns/prov#value>	"where P is a permutation matrix, L is unit lower triangular, and U is upper triangular." .