# Frontal solver by Bruce Irons? Am I using the right Algorithm here?

I am writing my Thesis on Direct Methods for sparse Matrizes, especially Frontalsolvers.It took me a while but I finally figured out how the Multifrontalsolver by Duff and Reid works.

But my Professor wants me to have the "original" Frontalsolver by Bruce Irons analysed aswell, but I am still not sure if figured it out completly.

Here is an example of a Matrix solved by (what I believe to be) a Frontalsolver by Bruce Irons.
Steps:

1. F0 is loaded and solved
3. F1 is loaded and solved