* covariance mapping principle and its relation to coincidences [1,3]
* three- and higher-fold covariance 
* what is partial covariance and why is it useful?
* the noise from uncorrelated background (false coincidences)
* can partial covariance mapping be generalised to multi-fold correlations?
The introduction is going to be brief - really, the audience should be familiar with earlier work:
Mapping: A Correlation Method Applied to Multiphoton Multiple
Ionisation. L J Frasinski, K Codling and P A Hatherly Science 246
multiple ionisation of N2O probed by three-dimensional covariance
mapping. L J Frasinski, P A Hatherly and K Codling Physics Letters A 156
mapping and triple coincidence techniques applied to multielectron
dissociative ionization. L J Frasinski, A J Giles, P A Hatherly, J H
Posthumus, M R Thompson and K Codling J. Electron Spectrosc. Relat.
Phenom. 79 367.371 (1996)
PDFs for the papers as we don't have access to Physics Letters A... PPT slides to follow...