%0 Journal Article %T Obtaining Simply Explicit Form and New Properties of Euler Polynomials by Differential Calculus %A Do Tan Si %J Applied Mathematics %P 460-480 %@ 2152-7393 %D 2023 %I Scientific Research Publishing %R 10.4236/am.2023.147029 %X Utilization of the shift operator to represent Euler polynomials as polynomials of Appell type leads directly to its algebraic properties, its relations with powers sums; may be all its relations with Bernoulli polynomials, Bernoulli numbers; its recurrence formulae and a very simple formula for calculating simultaneously Euler numbers and Euler polynomials. The expansions of Euler polynomials into Fourier series are also obtained; the formulae for obtaining all ¦Ðm as series on k-m and for expanding functions into series of Euler polynomials. %K Obtaining Appell Type Euler Numbers and Polynomials %K Relations Euler-Bernoulli Polynomials %K Sums over < %K i> %K k< %K sup> %K m< %K /sup> %K < %K /i> %K Series on < %K i> %K k< %K sup> %K -m< %K /sup> %K < %K /i> %K Euler Series of Functions %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=126610