[. Alam and P. Lefèvre, Essential norms of weighted composition operators on L 1 -Müntz spaces, Serdica Math, J, vol.40, pp.241-260, 2014.

. P. Be, T. Borwein, and . Erdélyi, Polynomials and polynomial inequalities, 1995.

. A. Ce, P. Clarkson, and . Erdös, Approximation by polynomials, Duke Math, J, vol.10, pp.5-11, 1943.

E. [. Chalendar, A. Fricain, D. Popov, V. Timotin, and . Troitsky, Finitely strictly singular operators between James spaces, Journal of Functional Analysis, vol.256, issue.4, pp.1258-1268, 2009.
DOI : 10.1016/j.jfa.2008.09.010
URL : https://hal.archives-ouvertes.fr/hal-00863668

. J. Djt, H. Diestel, A. Jarchow, and . Tonge, Absolutely summing operators, 1995.

. [. Erdélyi, The ``Full Clarkson???Erd??s???Schwartz Theorem'' on the closure of non-dense M??ntz spaces, Studia Mathematica, vol.155, issue.2, pp.145-152, 2003.
DOI : 10.4064/sm155-2-4

. I. Gl-]-v, W. Gurariy, and . Lusky, Geometry of Müntz spaces and related questions, Lecture Notes in Mathematics, 2005.

. [. Lefèvre, The Volterra operator is finitely strictly singular from <mml:math altimg="si1.gif" display="inline" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msup><mml:mrow><mml:mi>L</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn></mml:mrow></mml:msup></mml:math> to <mml:math altimg="si2.gif" display="inline" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msup><mml:mrow><mml:mi>L</mml:mi></mml:mrow><mml:mrow><mml:mi>???</mml:mi></mml:mrow></mml:msup></mml:math>, Journal of Approximation Theory, vol.214, pp.1-8, 2017.
DOI : 10.1016/j.jat.2016.11.001

. [. Lefèvre, Generalized Essential Norm of Weighted Composition Operators on some Uniform Algebras of Analytic Functions, Integral Equations and Operator Theory, vol.63, issue.4, pp.557-569, 2009.
DOI : 10.1007/s00020-009-1672-3

L. [. Lefèvre and . Rodríguez-piazza, Finitely strictly singular operators in harmonic analysis and function theory, Advances in Math, pp.119-152, 2014.

. J. Lt, L. Lindenstrauss, and . Tzafriri, Classical Banach spaces. I. Sequence spaces, 1977.

]. V. Mi and . Milman, Operators of class C 0 and C * 0 . (Russian) Teor. Funkcii Funkcional, Anal. i Prilo?en, pp.15-26, 1970.

. H. Ch, . Müntz, and H. A. Über-den-approximationssatz-von-weierstrass, Schwarz's Festschrift, pp.303-312, 1914.

. [. Noor, Embeddings of M??ntz Spaces: Composition Operators, Integral Equations and Operator Theory, vol.150, issue.1, pp.589-602, 2012.
DOI : 10.1007/s00020-012-1965-9

]. D. Ne and . Newman, A Müntz space having no complement, J. Approx. Theory, vol.40, pp.351-354, 1984.

]. A. Pl and . Plichko, Superstrictly singular and superstrictly cosingular operators, Functional analysis and its applications, North-Holland Math. Stud, 2004.

. [. Werner, A remark about Müntz spaces