27 Sep
                
                    2016
                
            
            
                27 Sep
                
                '16
                
            
            
            
        
    
                6:51 p.m.
            
        Dear Firedrakers, I have a (non-symmetric) system that I would like to extract a kernel from, probably using QR factorisation or similar. What is the best way to do this at scale? all the best --cjc -- http://www.imperial.ac.uk/people/colin.cotter www.cambridge.org/9781107663916