@inproceedings{c0d59a16df84468db7857f769bec99f7,

title = "On approximately identifying concept classes in the limit",

abstract = "In this paper, we introduce various kinds of approximations of a concept and propose a framework of approximate learning in case that a target concept could be outside the hypothesis space. We present some characterization theorems for approximately identifiability. In particular, we show a remarkable result that the upper-best approximate identifiability from complete data is collapsed into the upper-best approximate identifiability from positive data. Further, some other characterizations for approximate identifiability from positive data are presented, where we establish a relationship between approximate identifiability and some important notions in quasi-order theory and topology theory. The results obtained in this paper are essentially related to the closure property of concept classes under infinite intersections (or infinite unions). We also show that there exist some interesting example concept classes with such properties (including specialized EFS{\textquoteright}s) by which an upper-best approximation of any concept can be identifiable in the limit from positive data.",

author = "Satoshi Kobayashi and Takashi Yokomori",

year = "1995",

doi = "10.1007/3-540-60454-5_47",

language = "English",

isbn = "3540604545",

series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",

publisher = "Springer Verlag",

pages = "298--312",

editor = "Jantke, {Klaus P.} and Takeshi Shinohara and Thomas Zeugmann",

booktitle = "Algorithmic Learning Theory - 6th International Workshop, ALT 1995, Proceedings",

note = "6th International Workshop on Algorithmic Learning Theory, ALT 1995 ; Conference date: 18-10-1995 Through 20-10-1995",

}