Which of these statements is true?
(a) The Gauss-Gradient method is a special case of the least-square gradient method
(b) The least-square gradient method is a special case of the Gauss-Gradient method
(c) The least-square method is not connected with the Gauss-Gradient method
(d) The least-square method is suitable only for the Cartesian grids
I have been asked this question in an online interview.
My enquiry is from Diffusion Problem topic in chapter Diffusion Problem of Computational Fluid Dynamics