| Cones in Banach algebras H Raubenheimer, S Rode Indagationes Mathematicae 7 (4), 489-502, 1996 | 67 | 1996 |
| More spectral theory in ordered Banach algebras S Mouton, H Raubenheimer Positivity 1 (4), 305-317, 1997 | 42 | 1997 |
| Spectral properties of elements in different Banach algebras JJ Grobler, H Raubenheimer Glasgow Mathematical Journal 33 (1), 11-20, 1991 | 40 | 1991 |
| More on Fredholm theory relative to a Banach algebra homomorphism T Mouton, H Raubenheimer Proceedings of the Royal Irish Academy. Section A: Mathematical and Physical …, 1993 | 34 | 1993 |
| Ruston elements and Fredholm theory relative to arbitrary homomorphisms HT Mouton, S Mouton, H Raubenheimer Quaestiones Mathematicae 34 (3), 341-359, 2011 | 24 | 2011 |
| The index for Fredholm elements in a Banach algebra via a trace II J Grobler, H Raubenheimer, A Swartz Czechoslovak Mathematical Journal 66 (141), 205-211, 2016 | 23* | 2016 |
| On rank one and finite elements in Banach algebras T Mouton, H Raubenheimer Studia Math 104, 211-219, 1993 | 22 | 1993 |
| The index for Fredholm elements in a Banach algebra via a trace JJ Grobler, H Raubenheimer Studia Mathematica, 2008 | 19 | 2008 |
| Fredholm, Weyl and Browder theory III R Harte, H Raubenheimer Proceedings of the Royal Irish Academy. Section A: Mathematical and Physical …, 1995 | 19 | 1995 |
| On regularities and Fredholm theory L Lindeboom, H Raubenheimer Czechoslovak Mathematical Journal 52 (3), 565-574, 2002 | 18 | 2002 |
| Spectral characterizations of scalars in a Banach algebra G Braatvedt, R Brits, H Raubenheimer Bulletin of the London Mathematical Society 41 (6), 1095-1104, 2009 | 17 | 2009 |
| Gelfand-Hille type theorems in ordered Banach algebras G Braatvedt, R Brits, H Raubenheimer Positivity 13 (1), 39-50, 2009 | 17 | 2009 |
| On ideals of generalised invertible elements in Banach algebras RM Brits, L Lindeboom, H Raubenheimer Mathematical Proceedings of the Royal Irish Academy, 1-10, 2005 | 16 | 2005 |
| Fredholm theory relative to two Banach algebra homomorphisms T Mouton, H Raubenheimer Quaestiones Mathematicae 14 (4), 371-382, 1991 | 14 | 1991 |
| Perturbation by inessential and Riesz elements L Groenewald, RE Harte, H Raubenheimer Quaestiones Mathematicae 12 (4), 439-446, 1989 | 14 | 1989 |
| On domination of inessential elements in ordered Banach algebras D Behrendt, H Raubenheimer Illinois Journal of Mathematics 51 (3), 927-936, 2007 | 13 | 2007 |
| The o-spectrum of r-asymptotically quasi-finite-rank operators H Raubenheimer Quaestiones Mathematicae 7 (3), 299-303, 1984 | 11 | 1984 |
| Spectral theory in ordered Banach algebras S Mouton, H Raubenheimer Positivity 21, 755-786, 2017 | 10 | 2017 |
| A note on the singular and exponential spectrum in Banach algebras L Groenewald, H Raubenheimer Quaestiones Mathematicae 11 (4), 399-408, 1988 | 9 | 1988 |
| Fredholm theory for operators in an operator ideal with a trace. I JJ Grobler, H Raubenheimer, P van Eldik Integral equations and operator theory 5, 774-790, 1982 | 9 | 1982 |
R BritsAssociate Professor, University of JohannesburgVerified email at uj.ac.za
