Zhang Shi-sheng, Bian Wen-ming. Fixed Point Indexes and Its Applications to Nonlinear Integral Equations Modeling Infectious Diseases[J]. Applied Mathematics and Mechanics, 1989, 10(5): 385-392.
 Citation: Zhang Shi-sheng, Bian Wen-ming. Fixed Point Indexes and Its Applications to Nonlinear Integral Equations Modeling Infectious Diseases[J]. Applied Mathematics and Mechanics, 1989, 10(5): 385-392.

# Fixed Point Indexes and Its Applications to Nonlinear Integral Equations Modeling Infectious Diseases

• Publish Date: 1989-05-15
• In this paper the fixed point index problem for a class of positive operators with boundary control conditions is discussed,and some sufficient conditions for the fixed pointindex to be equal to 1 or 0 are given.Moreover,a general fixed point theorem of expansions and compressions for cone is obtained,which generalizes and improves the corresponding results of [3,8,9].As an application,we utilize the results presented above to study the existence conditions of positive solutions of nonlinear integral equations modelling infectious diseases.
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