Cosine polynomials with restrictions on their algebraic representation
Abstract
We prove that for any even algebraic polynomial $p$ one can find a cosine polynomial with an arbitrary small $l_1$-norm of coefficients such that the first coefficients of its representation as an algebraic polynomial in $\cos x$ coincide with those of $p$.
- Publication:
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arXiv e-prints
- Pub Date:
- August 2022
- DOI:
- arXiv:
- arXiv:2208.02583
- Bibcode:
- 2022arXiv220802583O
- Keywords:
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- Mathematics - Classical Analysis and ODEs
- E-Print:
- 17 pages