Assertion: graph's path | /r/HasProperty | studied in 9th century
Facets:
value: even earlier
type: TEMPORAL
Source sentences:
text: Even earlier, Hamiltonian cycles and paths in the knight's graph of the chessboard, the knight's tour, had been studied in the 9th century in Indian mathematics by Rudrata, and around the same time in Islamic mathematics by al-Adli ar-Rumi.