**Dr Brad Baxter**

I left Imperial College some time ago, in 2001, and now teach at
Birkbeck College,
another part of the University of London.

**Room 755**

**+44 20 7631 6453(office), +44 7931 751328**

Email: b.baxter@bbk.ac.uk

Address: Birkbeck College, Malet Street, London WC1E 7HX

###
Research Interests :

- General Research interests : Numerical Analysis
- Particular Research Interests : Approximation theory, numerical
linear algebra, concentration of measure, mathematical finance

Sivakumar ( Math Dept, Texas A&M University ) and I have
worked together on several papers.

My Birkbeck Data Mining coursework

### My Numerical Analysis course given at Imperial

M2N1

###
My Mathematical Finance course at Imperial:

Click here
### Other courses :

Click here
### Some papers :

Conditionally positive functions and p-norm
distance matrices, *Constructive Approximation* **7**
(1991), 427--440.
On the asymptotic behaviour of the span
of
translates
of the multiquadric $\phi(r)=(r^2 + c^2)^{1/2}$ as $c \to \infty$, *Comput.
Math. Applic.* **24** (1994), 1--6.
(with C. A. Micchelli) Norm estimates for
the
$\ell^2$
inverses of multivariate Toeplitz matrices, *Numerical Algorithms***1**
(1994), 103--117.
Norm estimates for inverses of Toeplitz
distance
matrices, *J. Approx. Theory* **79** (1994), 222--242.
(with N. Sivakumar and J. D. Ward)
Regarding
the
p-norms of radial basis interpolation matrices, *Constructive
Approximation* **10** (1994), 451--468.
(with N. Sivakumar) On shifted cardinal
interpolation
for the Gaussian and the multiquadric, *J. Approx. Theory* **87**
(1996), 36--59.
(with A. Iserles) On approximation by
exponentials,
in *Annals of numerical Mathematics* Vol 4, 1997.
(with S. Hubbert) Radial basis functions
for
the
sphere. In *Progress in Multivariate Approximation*,
Volume 137 of the International Series of Numerical Mathematics,
Birkhauser,
2001.
Preconditioned conjugate gradients,
radial basis functions and Toeplitz matrices. In *Comput.
Math. Applic. *43 (2001),
305--318.
Positive definite functions on
Hilbert
space. In East Journal of
Approximation 10 (2004),
269--274.
Rapid Evaluation of Conditionally Negative Definite
Functions, *Journal of Computational and Applied
Mathematics** *180
(2005), 51-70.
Scaling
radial basis functions via Euclidean distance matrices. In Comput. Math. Applic. 51 (2006), 1163--1170.

A covariance matrix
inversion problem arising from the construction of phylogenetic trees.With
Tom Nye and Wally Gilks. In LMS
Journal of Computation and Mathematics 10 (2007), 119--131.

(with R. Brummelhuis) Exponential
Brownian Motion and Divided Differences.

### My PhD dissertation :

### Tom and Anna in 2000. I shall add a picture of Theo soon too. I
really should add some more recent images . . .