Uniform n-analytic polynomial approximations of functions on rectifiable contours in ℂ. / Fedorovskii, K. Yu.
In: Mathematical Notes, Vol. 59, No. 4, 1996, p. 435-439.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Uniform n-analytic polynomial approximations of functions on rectifiable contours in ℂ
AU - Fedorovskii, K. Yu
PY - 1996
Y1 - 1996
N2 - We study approximations of functions by n-analytic polynomials in the uniform norm on closed rectifiable Jordan curves in the complex plane. It is shown that, in contrast to the case of uniform approximations by complex polynomials, there are no topological criteria for the existence of such approximations. We obtain a criterion for the existence of n-analytic polynomial approximations in terms of analytic properties of these curves.
AB - We study approximations of functions by n-analytic polynomials in the uniform norm on closed rectifiable Jordan curves in the complex plane. It is shown that, in contrast to the case of uniform approximations by complex polynomials, there are no topological criteria for the existence of such approximations. We obtain a criterion for the existence of n-analytic polynomial approximations in terms of analytic properties of these curves.
UR - http://www.scopus.com/inward/record.url?scp=27644525343&partnerID=8YFLogxK
U2 - 10.1007/bf02308692
DO - 10.1007/bf02308692
M3 - Article
AN - SCOPUS:27644525343
VL - 59
SP - 435
EP - 439
JO - Mathematical Notes
JF - Mathematical Notes
SN - 0001-4346
IS - 4
ER -
ID: 86670127