Results 151 to 160 of about 574,412 (205)

Experimental observation of energy-band Riemann surface. [PDF]

open access: yesSci Adv
Cheng D   +5 more
europepmc   +1 more source

Rational Chebyshev Approximation in the Complex Plane

SIAM Journal on Numerical Analysis, 1976
We discuss the characterization and computation of best rational Chebyshev approximations to complex-valued functions on subsets of the complex plane. A descent algorithm is presented (which includes a device for controlling the position of poles of the approximating rationale) for computing local best approximations.
Ellacott, S., Williams, Jack
openaire   +2 more sources

Incomplete rational approximation in the complex plane

Constructive Approximation, 1995
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Borwein, P. B., Chen, Weiyu
openaire   +2 more sources

Complex temperature plane zeros in the mean-field approximation

Journal of Statistical Physics, 1986
The authors derive asymptotic expressions for the complex temperature plane zeros of the infinite-range Ising model in the scaling regime. The results also apply to high-dimensional, short-range Ising systems. For the nth zero in a system of N spins, the leading asymptotic result is t/sub n/ varies as (n/N)/sup 1/2/(-1+/-i).
M. L. Glasser   +2 more
openaire   +1 more source

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