Basha, S. Sadiq - In: Journal of Global Optimization 54 (2012) 2, pp. 367-373
Given non-empty subsets A and B of a metric space, let <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$${S{:}A{\longrightarrow} B}$$</EquationSource> </InlineEquation> and <InlineEquation ID="IEq2"> <EquationSource Format="TEX">$${T {:}A{\longrightarrow} B}$$</EquationSource> </InlineEquation> be non-self mappings. Due to the fact that S and T are non-self mappings, the equations Sx=x and Tx=x are likely to have no common solution, known as a common fixed point...</equationsource></inlineequation></equationsource></inlineequation>