olemus
maatriksile vastava lineaarkujutuse järk
= the dimension of the vector space generated by the columns of a matrix

ülevaateid
https://en.wikipedia.org/wiki/Rank_(linear_algebra)

https://www.dr-eriksen.no/teaching/GRA6035/2010/lecture2-hand.pdf

https://blogmedia.testbook.com/blog/wp-content/uploads/2016/09/Rank-of-a-Matrix-and-Its-Properties-GATE-Study-Material-in-PDF.pdf