dm.cs.tu-dortmund.de/mlbits/cluster-various/
Further Clustering Approaches – Lecture Notes
\begin{cases} \min \{ 0, r(k,k) + \sum \nolimits _{j\not\in \{ i,k\} }\max (0, r(j,k))\} & i\neq k \\ \hphantom{\min \{ 0, r(k,k) + \; }\sum \nolimits _{j\not\in \{ k\} \hphantom{i,}}\max (0, r(j,k)) & i=k [...] categorical attributes . ICDE (1999), 512–521.
[HiGa07]
Hinneburg, A. and Gabriel, H.-H. 2007. DENCLUE 2.0: Fast clustering based on kernel density estimation . Advances in intelligent data analysis VII (2007) …
