<http://webisa.webdatacommons.org/188127447>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<computersight.com> .
<http://webisa.webdatacommons.org/188127447>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/124385089>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/188127447> .
<http://webisa.webdatacommons.org/188127447>	<http://www.w3.org/ns/prov#value>	"For example, if A is a 3-by-0 matrix and B is a 0-by-3 matrix, then AB is the 3-by-3 zero matrix corresponding to the null map from a 3-dimensional space V to itself, while BA is a 0-by-0 matrix." .