A unified approach to $q$-special functions of the Laplace type

We propose a unified approach to $q$-special functions, which are degenerations of basic hypergeometric functions ${}_2ϕ_1(a,b;c;q,x)$. We obtain a list of seven different class of $q$-special functions: ${}_2ϕ_1, {}_1ϕ_1$, two different types of the $q$-Bessel functions, the $q$-Hermite-Weber functions, two different types of the $q$-Airy functions. We show that there exist a relation between two types of the $q$-Airy functions.

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