I determined the dimension Nul A, for the matrix A given. This problem is contained within "Linear Algebra and it's Applications," David C. Lay, 2003, Pearson Education. This textbook is currently used for Math-18 at the University of California, San Diego, where Vector Calculus is a mandatory prerequisite for class enrollment eligibility. -Mark R. Rowe

I determined the dimension Nul A, for the matrix A given.  This problem is contained within "Linear Algebra and it's Applications," David C. Lay, 2003, Pearson Education.    This textbook is currently used for Math-18 at the University of California, San Diego, where Vector Calculus is a mandatory prerequisite for class enrollment eligibility.  

-Mark R. Rowe