Search: existential graphs

Component	Date	Genre
[The Branches of Geometry; Ex…	1904-1905?]	autograph manuscript,…
On Existential Graphs	circa 1901	autograph manuscript
On Existential Graphs (F4)	1898	autograph manuscript
On Existential Graphs (EG)	undated	autograph manuscript

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The query

PREFIX a: <https://hollisarchives.lib.harvard.edu/ontology#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT ?title ?date ?genre WHERE { ?c rdfs:label ?title . FILTER(CONTAINS(LCASE(STR(?title)), "existential graphs")) OPTIONAL { ?c a:dateText ?date } OPTIONAL { ?c a:genre ?genre } } LIMIT 40

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