# Items where Year is 1993

**9**.

## D

Demmel, James W. and Higham, Nicholas J.
(1993)
*Improved error bounds for underdetermined system solvers.*
SIAM Journal On Matrix Analysis And Applications, 14 (1).
pp. 1-14.
ISSN 1095-7162

## H

Higham, Nicholas J.
(1993)
*Optimization by direct search in matrix computations.*
SIAM Journal On Matrix Analysis And Applications, 14 (2).
pp. 317-333.
ISSN 1095-7162

Higham, Nicholas J.
(1993)
*Perturbation Theory and Backward Error for $AX-XB=C$.*
BIT Numerical Mathematics, 33.
pp. 124-136.
ISSN 1572-9125

Higham, Nicholas J. and Knight, Philip A.
(1993)
*Finite precision behavior of stationary iteration for solving singular systems.*
Linear Algebra and its Applications, 192.
pp. 165-186.
ISSN 0024-3795

## M

MacKay, R. S. and Muldoon, M. R.
(1993)
*Diffusing through spectres: ridge curves, ghost circles and a partition of phase space.*
Physics Letters A, 178 (3-4).
pp. 245-250.
ISSN 0375-9601

Montaldi, James
(1993)
*Multiplicities of Critical Points of Invariant
Functions.*
Matematica Contempor ˆanea, 5.
pp. 93-135.

Montaldi, James and van Straten, Duco
(1993)
*Quotient spaces and critical points of invariant functions
for C*-actions.*
J. reine angew. Math., 437.
pp. 55-99.
ISSN 0075-4102

Muldoon, M. R. and MacKay, R. S. and Huke, J. P. and Broomhead, D. S.
(1993)
*Topology from time series.*
Physica D, 65 (1-2).
pp. 1-16.
ISSN 0167-2789

## P

Plymen, Roger
(1993)
*Noncommutative geometry: illustrations from the representation theory of GL(n).*
In: Representation theory of algebraic groups over local fields and applications, 26 July - 6 August 1993, Valparaiso and Santiago, Chile.
(Unpublished)