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An oriented matroid of rank 3 is pure if and only if it is a positroid (up to reorienting and relabeling its ground set)
Starving the Anxiety Gremlin for Children Aged 5-9
open data and data infrastructures analysis of the utility and value of big and open data for research
health professionals and all practitioners working with families affected by drug use
focusing on mental illness as a problem of the brain
The Royal Air Force in American Skies Karen Bunting An oriented matroid of rankBy early 1941, Great Britain stood alone against the aerial might of Nazi Germany and was in need of pilots. The Lend Lease Act allowed for the training of British pilots in the United States and the formation of British Flying Training Schools. These unique schools were owned by American operators, staffed with American civilian instructors, supervised by British Royal Air Force officers, utilized aircraft supplied by the US Army Air Corps, and used
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