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Morse code sequences are very useful to give combinatorial interpretations of various properties of Fibonacci numbers. In this note we study some algebraic and combinatorial aspects of Morse code sequences and obtain several q-analogues of Fibonacci numbers and Fibonacci polynomials and their generalizations. 1 Morse code polynomials Morse code sequences(More)
0. INTRODUCTION Let MC be the monoid of all Morse code sequences of dots a(:=®) and dashes b(: =-) with respect to concatenation. MC consists of all words in a and b. Let P be the algebra of all polyno-mials H veMC K v w ^h r e a l coefficients. We are interested in: a) polynomials in P which we call abstract Fibonacci polynomials. They are defined by the(More)
We give simple proofs for the Hankel determinants of q − exponential polynomials. Let (,) S n k be the Stirling numbers of the second kind. Christian Radoux ([6]) has shown that the Hankel determinants of the exponential polynomials 0 () (,) n k n k B x S n k x = = ∑ are given by () 1 1 2 , 0 0 det () !. In [2] I have proved some q − analogues of this(More)
In this note we give a survey about polynomials whose moments are multiples of super Catalan numbers and explore two different kinds of q  analogues. The moments of Lucas polynomials and of Chebyshev polynomials of the first kind are (multiples of) central binomial coefficients and the moments of Fibonacci polynomials and of Chebyshev polynomials of the(More)
In [1] and in my unpublished survey paper [2] I have calculated Hankel determinants for the coefficients of two classes of generating functions which are associated with certain q − exponential functions. It turns out that the methods used in [3] give simpler proofs of these facts. Since the proofs are simple extensions of the proofs in [3] I shall only(More)
We give a survey of some interesting q  analogues of Fibonacci, Lucas, Chebyshev and related polynomials and their moments. 0. Introduction The moments of the Fibonacci polynomials or equivalently of the Chebyshev polynomials of the second kind are (multiples of) the Catalan numbers 2 1 1 n n C n n         and the moments of the Lucas polynomials(More)