411 REFERENCE · Wiktionary
Cremona-Richmond configuration
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
thumb|upright=1.2|The Cremona–Richmond configuration
Etymology
It was studied by Cremona (1877) and Richmond (1900).
Proper noun
en geometry A configuration of 15 lines and 15 points, having three points on each line and three lines through each point, and containing no triangles.
en eponyms