@prefix prov: . @prefix rdfs: . @prefix matsci: . a prov:Entity ; rdfs:label "pseudopotential" ; "2026-07-26 11:21:42.089071" . a prov:Entity, matsci:Definition ; rdfs:label "Definition 1" ; "1" . a prov:Entity, matsci:Definition ; rdfs:label "Definition 2" ; "2" . a prov:Entity, matsci:DefinitionRevision ; rdfs:label "Definition 1 · revision 1 (current)" ; prov:value "A simplified stand-in for the nucleus and tightly bound core electrons of an atom, constructed so that the valence electrons behave as they would in the full system. Replacing the sharply varying core region with a smooth effective potential is what makes plane-wave electronic structure calculations tractable." ; "1" ; "1" ; "2026-07-26 11:21:42.089071+00" ; "initial" ; "1" ; "yes" ; "no" ; "Results from two studies disagreed until the authors noted that each had used a different pseudopotential for oxygen." ; "Christopher Rauch" ; "Initial contribution" . a prov:Activity ; rdfs:label "Write definition" ; "2026-07-26 11:21:42.089071+00" ; "initial" . a prov:Person ; rdfs:label "Christopher Rauch" . a prov:Entity, matsci:DefinitionRevision ; rdfs:label "Definition 2 · revision 1 (current)" ; prov:value "An effective potential used in computational quantum mechanics to replace the complex interaction between an ion's nucleus and its core electrons with a simplified potential, focusing calculations solely on the chemically active valence electrons." ; "2" ; "1" ; "2026-07-26 11:21:50.647541+00" ; "ai_generation" ; "0" ; "yes" ; "no" ; "By employing a norm-conserving pseudopotential, the researcher significantly reduced the computational cost of the density functional theory (DFT) simulation without sacrificing the accuracy of the bond-length predictions." ; "MatBot Gemma 4" ; "Initial AI-generated definition" ; "gemma4:26b" ; "You are a materials science reference. When given a term, recall its established meaning in the materials science literature and define it as a technical glossary would: precise, concise, and specific to materials science. Return the definition and one example sentence using the term. Your example must be your own; do not reuse the example provided by the user." . a prov:Activity ; rdfs:label "Generate definition" ; "2026-07-26 11:21:50.647541+00" ; "ai_generation" . a prov:SoftwareAgent ; rdfs:label "gemma4:26b" . a prov:Entity ; rdfs:label "prompt: materials-reference" ; prov:value "You are a materials science reference. When given a term, recall its established meaning in the materials science literature and define it as a technical glossary would: precise, concise, and specific to materials science. Return the definition and one example sentence using the term. Your example must be your own; do not reuse the example provided by the user." ; "218eb36342d599c9" ; "materials-reference" . _:example_eafa21ba02353815_1_1 a prov:Entity ; rdfs:label "Definition 1 · example 1" ; prov:value "Results from two studies disagreed until the authors noted that each had used a different pseudopotential for oxygen." ; "1" ; "1" ; "yes" ; "Imported legacy example; exact source, actor, and time were not recorded" . _:publishExample_eafa21ba02353815_1_1 a prov:Activity ; rdfs:label "Import legacy example" ; "yes" ; "Legacy import; publication time was not recorded" . _:example_eafa21ba02353815_2_1 a prov:Entity ; rdfs:label "Definition 2 · example 1" ; prov:value "By employing a norm-conserving pseudopotential, the researcher significantly reduced the computational cost of the density functional theory (DFT) simulation without sacrificing the accuracy of the bond-length predictions." ; "2" ; "1" ; "yes" ; "Imported legacy example; exact source, actor, and time were not recorded" . _:publishExample_eafa21ba02353815_2_1 a prov:Activity ; rdfs:label "Import legacy example" ; "yes" ; "Legacy import; publication time was not recorded" . _:featureExample_eafa21ba02353815_1_1 a prov:Activity ; rdfs:label "Import featured state for example 1" ; "import legacy featured state" ; "yes" ; "Selector and selection time were not recorded" . _:featuredExample_eafa21ba02353815_1_1 a prov:Entity ; rdfs:label "Featured example 1" ; "1" ; "1" ; "active" ; "yes" ; "Selection time was not recorded" . _:featureExample_eafa21ba02353815_2_2 a prov:Activity ; rdfs:label "Import featured state for example 1" ; "import legacy featured state" ; "yes" ; "Selector and selection time were not recorded" . _:featuredExample_eafa21ba02353815_2_2 a prov:Entity ; rdfs:label "Featured example 1" ; "2" ; "1" ; "active" ; "yes" ; "Selection time was not recorded" . a prov:Entity ; rdfs:label "Initial message" ; prov:value "\npseudopotential\n\nResults from two studies disagreed until the authors noted that each had used a different pseudopotential for oxygen." . a prov:Activity ; rdfs:label "Upvote on definition 1 · revision 1" ; "2026-07-26 11:22:23.770925+00" ; "human" ; "no" ; "yes" . prov:specializationOf . prov:specializationOf . prov:wasDerivedFrom . prov:wasGeneratedBy . prov:wasAssociatedWith . prov:wasAttributedTo . prov:wasDerivedFrom . prov:wasGeneratedBy . prov:wasAssociatedWith . prov:wasAttributedTo . prov:used . _:example_eafa21ba02353815_1_1 prov:wasGeneratedBy _:publishExample_eafa21ba02353815_1_1 . _:publishExample_eafa21ba02353815_1_1 prov:used . _:example_eafa21ba02353815_2_1 prov:wasGeneratedBy _:publishExample_eafa21ba02353815_2_1 . _:publishExample_eafa21ba02353815_2_1 prov:used . _:featureExample_eafa21ba02353815_1_1 prov:used _:example_eafa21ba02353815_1_1 . _:featureExample_eafa21ba02353815_1_1 prov:used . _:featuredExample_eafa21ba02353815_1_1 prov:wasGeneratedBy _:featureExample_eafa21ba02353815_1_1 . _:featuredExample_eafa21ba02353815_1_1 prov:wasDerivedFrom _:example_eafa21ba02353815_1_1 . _:featureExample_eafa21ba02353815_2_2 prov:used _:example_eafa21ba02353815_2_1 . _:featureExample_eafa21ba02353815_2_2 prov:used . _:featuredExample_eafa21ba02353815_2_2 prov:wasGeneratedBy _:featureExample_eafa21ba02353815_2_2 . _:featuredExample_eafa21ba02353815_2_2 prov:wasDerivedFrom _:example_eafa21ba02353815_2_1 . prov:wasAttributedTo . prov:used . prov:used .