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7 results on '"Helen G. Russell"'

1. Recent Publications

Author

William Viavant, Joseph S. Wholey, C. E. Springer, Edith R. Schneckenburger, Arthur E. Danese, Pasquale Porcelli, Florence M. Mears, Helen G. Russell, E. L. Walters, H. Kaufman, Violet Hachmeister Larney, Frederick Way, James H. McKay, D. C. Murdoch, M. A. Shader, and H. L. Alder

Subjects
General Mathematics
Published
1961
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2. Recent Publications

Author

C. C. MacDuffee, H. Busemann, Helen G. Russell, D. A. Page, R. G. Selfridge, Richard Bellman, R. G. Sanger, Nathan Altshiller Court, Gordon Latta, James L. Simpson, H. C. Wang, Paul M. Hummel, and Cletus O. Oakley

Subjects
General Mathematics
Published
1958
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3. On the convergence and overconvergence of sequences of polynomials of best simultaneous approximation to several functions analytic in distinct regions

Author

Helen G. Russell and J. L. Walsh

Subjects
Combinatorics, Discrete mathematics, Unit circle, Applied Mathematics, General Mathematics, media_common.quotation_subject, Point set, Convergence (routing), Function (mathematics), Infinity, Mathematics, Complement (set theory), media_common
Abstract

THEOREM I. Let M be an arbitrary closed limited point set of the z-plane whose complement K is connected and possesses a Green's function with pole at infinity.t Let w = co(z) be a function which maps K (conformally but not necessarily uniformly) onto the exterior of the unit circle in the w-plane so that the points at infinity in the two planes correspond to each other. Let CR denote the transform (i.e., in K) of I wI = R, R > 1, under the mapping function w =X(z). (1) If thefunctionf(z) is analytic and single-valued on and within CR, there exist polynomials Pn(z) of respective degrees nt, n =, 2, * * , such that the inequalities

Published
1934
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4. Recent Publications

Author

D. C. B. Marsh, Robert M. Exner, Pasquale Porcelli, Marion E. Stark, Virginia Carlton, Tom Smith, Howard Eves, Frank M. Weida, Helen G. Russell, A. A. Grau, Truman Wester, Ivan Niven, and R. S. Pierce

Subjects
General Mathematics
Published
1961
Full Text
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