Extension theorem for simultaneous q-difference equations and some its consequences

W Jarczyk, P Pasteczka - Results in Mathematics, 2024 - Springer
Given a set T⊂(0,+∞), intervals I⊂(0,+∞) and J⊂ R, as well as functions gt: I× J→ J with t's
running through the set T∗:= T∪{t-1: t∈ T}∪{1} we study the simultaneous q-difference …