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锥上的逼近定理和不动点定理

APPROXIMATION THEOREM AND FIXED POINT THEOREM IN CONES
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摘要 X是Banach空间,KX是一个锥,intK≠φ;K<sub>R</sub>={x∈K:0≤ⅡxⅡ【R},K<sub>r,R</sub>={x∈K:r【ⅡxⅡ【R}(0【r【R).设T:K<sub>R</sub>→2<sup>K</sup>是k-集压缩(0≤k【1)满足条件:ⅡφⅡ≥ⅡxⅡ,v∈T(x),x∈(?)K<sub>r</sub>,则存在u<sub>0</sub>∈K<sub>r,R</sub>使得d(u<sub>0</sub>,T(u<sub>0</sub>)))=d(T(u<sub>0</sub>),(K)<sub>r,R</sub>)=d(T(u<sub>0</sub>),(K)<sub>R</sub>).作为此结果的应用,给出一个新的不动点定理. In this paper a new approximation theorem for a h-set-contraction mappings defined by an annulus in cone isobtained.With its application a new fixed point is derived.
作者 田有先
出处 《四川师范大学学报(自然科学版)》 CAS CSCD 1993年第6期29-33,共5页 Journal of Sichuan Normal University(Natural Science)
关键词 不动点 逼近定理 fixed points cone approximation theorem
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参考文献2

  • 1张庆雍.k-集压缩映射的边界条件[J].四川师范大学学报(自然科学版),1992,15(6):27-33. 被引量:1
  • 2Roger D. Nussbaum. The fixed point index for local condensing maps[J] 1971,Annali di Matematica Pura ed Applicata, Series 4(1):217~258

二级参考文献10

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