PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Linear systems are ubiquitous; they are more central to the curriculum than nonlinear systems, and moreover adding and subtracting equations is a special case of adding linear combinations of equations, which is an early phase in the study of linear algebra.
http://www.w3.org/ns/prov#wasQuotedFrom
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