Adjective
jth (not comparable)
(mathematics) Occurring at position j in a sequence.
The minor M i,j is defined to be the determinant of the (n−1) × (n−1) -matrix that results from A by removing the ith row and the jth column. Source: Internet
Jan's Tutoring House (JTH) held their 2016 Red Carpet Awards on February 28 at HillCenter. Source: Internet
Note, also, that if there are multiple heat flows, the term is replaced by where is the heat flow and is the temperature at the jth heat flow port into the system. Source: Internet