Goncharov, Alexander2021-02-272021-02-272020-080133-3852http://hdl.handle.net/11693/75631We show that, for each compact subset of the real line of infinite cardinality with an isolated point, the space of Whitney jets on the set does not possess a basis consisting only of polynomials. On the other hand, polynomials are dense in any Whitney space. Thus, there are no general results about stability of bases in Fréchet spaces.EnglishPolynomial baseStability of basesTopological baseWhitney spaceArticle10.1007/s10476-020-0056-4