Brian Borchers

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Name	Brian Borchers
Member for	2 years
Seen	yesterday
Website	nmt.edu/~borchers
Location	Socorro, NM
Age	49

I'm a professor of mathematics at New Mexico Tech, in Socorro, NM. My mathematical interests are primarily in optimization and applications of optimization to parameter estimation and inverse problems, particularly in the earth sciences.

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What do you do if you find a typo in an equation of a paper?

Are there ill-conditioned problems in infinite precision arithmetric?

sparsity of QR decomposition

Dimensional Analysis in Mathematics

Fit to a normal distribution

Cross correlation detection in binary Hamming distance

Elementary mathematical books

How do you tell if a system of linear inequalities has a solution?

Is that true all the convex optimization problems can be solved in polynomial time using interior-point algorithms

What software one needs to solve a big linear system on a small computer?

Explicit formula for Cholesky factorization in a special case

Nonlinearly constrained optimization (quadratic)

Inverting products of matrices (2)

Use of games to approximate solutions to Partial Differential Equations

What are an adviser’s responsibilities?

How to solve Ax=b incrementally ?

Starting PhD at the age of 25

Inverting Hessian matrix

Operations research, MS, related career fields

Approximating derivatives between gridpoints

How to approx. decompose a sym. p.d. matrix M into X’X?

Suggestions for teaching advanced high school students

Linear program to maximize the minimum absolute value of linear functions ?

Computational complexity of unconstrained convex optimisation

Characterising semi-definite positiveness on vectors with non-negative entries

How to solve a system of linear equations without storing the matrix?

Cascading minimization problems

Sparsity of Cholesky factors

Normal distribution with positive SEMI-definite covariance matrix

Optimizing directly on the eigenspectrum of a matrix

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