Gate 2013 IN What do you mean by dimension of null space?

Question

Comments

is it in GATE CS syllabus ?

Answer 1

Dimension of Null Space=Order-Rank

And Here Dimension of Null Space=3-2=1

Comments

if any matrix have different row and different column such as 3*4 then what will we assume as order 3 or 4

because DONS= ORDER-RANK

CAN WE TAKE MIN(M,N) AS ORDER