This usually stand for the variable or function after some type of transformation has been done to it such as maybe taking the derivative of a function or rotating a variable about the x axis, or as in the example above $[x',y',z']$ represent the $[x.y.z]$ vector after it has gone through the matrix transformation. Z' can be pronounced as "Z prime"
This usually stand for the variable or function after some type of transformation has been done to it such as maybe taking the derivative of a function or rotating a variable about the x axis, or as in the example above $[x',y',z']$ represent the $[x.y.z]$ vector after it has gone through the matrix transformation. Z' can be pronounced as "Z prime"