Figure 1From: Existence of positive solution to a coupled system of singular fractional difference equations via fractional sum boundary value conditionsThe graph of \(u_{1}(t_{1})\) where \(t_{1}\in {\mathbb{N}} _{\frac{1}{3},\frac{34}{3}} \) and \(u_{2}(t_{2})\) where \(t_{2}\in {\mathbb{N}}_{\frac{1}{2},\frac{23}{2}}\)Back to article page