**Many classifiers are in
close rivalry with each other. Why?**

**Sources of
Difficulty
in Classification**

**Classification Boundaries
As Decided by Different Classfiers**

**Match between Classifiers
and Problems**

**Measures of Geometrical
Complexity
of Classification Problems**

**Geometry of Datasets and
Classifiers**

**Measures of Geometric
Complexity**

**Measures of Geometrical
Complexity**

**Experiments with Controlled
Data Sets**

**Patterns in Complexity
Measure Space
lin.sep¯ lin.nonsep+ random**

**Loadings of the First 6
Prin. Comp.**

**Interpretation of the First
4 Prin. Comp.**

**Domains of Competence of
Classifiers**

**Domain of Competence
Experiment**

**Classifier Domains of
Competence**

**Best Classifier Being
nn,lp,odt vs an ensemble technique**

**Other Studies on Data
Complexity**