The constrained least-squares n × n-matrix problem where the feasibility set is the subspace of the Toeplitz matrices is analyzed. The general, the upper and lower triangular cases are solved by ...

Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington 98195, United States ...

Introduction: Animal influenza viruses pose a danger to the general public. Eurasian avian-like H1N1 (EA H1N1) viruses have recently infected humans in several different countries and are often found ...

I find when I use large basis to perform some accuracy tests. However, sometimes I find the calculation stucks at the beginning of SCF procedure, this makes me quite confused. Later when I switch ...

Ask the publishers to restore access to 500,000+ books. A line drawing of the Internet Archive headquarters building façade. An illustration of a heart shape "Donate to the archive" An illustration of ...

ABSTRACT: Accurately approximating higher order derivatives is an inherently difficult problem. It is shown that a random variable shape parameter strategy can improve the accuracy of approximating ...

Presenting an algorithm that solves linear systems with sparse coefficient matrices asymptotically faster than matrix multiplication for any ω > 2. Our algorithm can be viewed as an efficient, ...

Generating a 3 x 3 non-singular matrix with 3 non-zeroes Generated matrix: Real symmetric positive definite matrix, dimension 3x3 with 3 entries. 0: 9.9999E-01 1: -3.1031E-01 2: 3.9037E-01 This matrix ...