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math.CO2026
Some remarks about q-Narayana polynomials for q=-1
Johann Cigler
We obtain some properties of the q-Narayana polynomials for q=-1 and compare them to corresponding properties for q=1.
math.CO2025
Some power series extensions of Fibonacci and Lucas polynomials
Johann Cigler
We study formal power series which can be interpreted as interpolations of Fibonacci and Lucas polynomials with even (or odd) indices.
math.CO2025
A bivariate version of the spread polynomials
Johann Cigler
We study a bivariate variant of Hans-Christian Herbig's version of Norman Wildberger's spread polynomials.
math.CO2025
Fibonacci, Lucas, and Spread Polynomials
Johann Cigler
This note gives an elementary exposition of a variant of the spread polynomials in terms of Fibonacci and Lucas polynomials.