<http://webisa.webdatacommons.org/155615037>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/472251858>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/155615037> .
<http://webisa.webdatacommons.org/155615037>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<boundaryvalueproblems.com> .
<http://webisa.webdatacommons.org/155615037>	<http://www.w3.org/ns/prov#value>	"Then u is a solution of the differential equation (2), if and only if ??[u] = u." .