In-Close, a fast algorithm for computing formal concepts

ANDREWS, S. (2009). In-Close, a fast algorithm for computing formal concepts. In: International Conference on Conceptual Structures (ICCS), Moscow, 2009.

Download (202kB) | Preview
    Official URL:


    This paper presents an algorithm, called In-Close, that uses incremental closure and matrix searching to quickly compute all formal concepts in a formal context. In-Close is based, conceptually, on a well known algorithm called Close-By-One. The serial version of a recently published algorithm (Krajca, 2008) was shown to be in the order of 100 times faster than several well-known algorithms, and timings of other algorithms in reviews suggest that none of them are faster than Krajca. This paper compares In-Close to Krajca, discussing computational methods, data requirements and memory considerations. From experiments using several public data sets and random data, this paper shows that In-Close is in the order of 20 times faster than Krajca. In-Close is small, straightforward, requires no matrix pre-processing and is simple to implement.

    Item Type: Conference or Workshop Item (Paper)
    Additional Information: Final version of paper accepted (via peer review) for the International Conference on Conceptual Structures (ICCS) 2009, Moscow
    Research Institute, Centre or Group: Cultural Communication and Computing Research Institute > Communication and Computing Research Centre
    Depositing User: Ann Betterton
    Date Deposited: 02 Apr 2009
    Last Modified: 21 Dec 2010 11:29

    Actions (login required)

    View Item


    Downloads per month over past year

    View more statistics