Analisis Eksistensi Infimum Image Dari Fungsi Lower Semi-Continuous dari Atas
DOI:
https://doi.org/10.29303/emj.v1i1.4Keywords:
fungsi lower semi-continous dari atasAbstract
In some cases in applied mathematics, the continuous function is not used, but rather the weaker function, i.e. lower semi-continuous function from above. One of the basic properties of the function that needs to be known is the existence of the infimum value of the function image. In the case of a continuous function, the existence of infimum is assured by several assumptions, one of which is the function domain which is a closed set and the function is a bounded function. In this paper, we describe the properties that ensure the existence of infimum of the image of a lower semi-continuous function from above. Based on the results, it is found that the existence of infimum of the image of a lower semi-continuous function from above is assured in the domain which is a compact set and also assured if the function is a convex function.References
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Ekeland, I., and Temam, R., 1976, Convex Analysis And Variational Problems, American Alsevier Publishing Company. Inc, New York.
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