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 (207kB) | 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
Departments: Faculty of Science, Technology and Arts > Computing
Depositing User: Ann Betterton
Date Deposited: 02 Apr 2009
Last Modified: 12 May 2018 06:35

Actions (login required)

View Item View Item


Downloads per month over past year

View more statistics