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Optimization in Reproducing Kernel Hilbert Spaces of Spike Trains

In: Computational Neuroscience

Author

Listed:
  • António R.C. Paiva

    (University of Florida)

  • Il Park

    (University of Florida)

  • José C. Príncipe

    (University of Florida)

Abstract

This chapter presents a framework based on reproducing kernel Hilbert spaces (RKHS) for optimization with spike trains. To establish the RKHS for optimization we start by introducing kernels for spike trains. It is shown that spike train kernels can be built from ideas of kernel methods or from the intensity functions underlying the spike trains. However, the later approach shall be the main focus of this study. We introduce the memoryless cross-intensity (mCI) kernel as an example of an inner product of spike trains, which defines the RKHS bottom-up as an inner product of intensity functions. Being defined in terms of the intensity functions, this approach toward defining spike train kernels has the advantage that points in the RKHS incorporate a statistical description of the spike trains, and the statistical model is explicitly stated. Some properties of the mCI kernel and the RKHS it induces will be given to show that this RKHS has the necessary structure for optimization. The issue of estimation from data is also addressed. We finalize with an example of optimization in the RKHS by deriving an algorithm for principal component analysis (PCA) of spike trains.

Suggested Citation

  • António R.C. Paiva & Il Park & José C. Príncipe, 2010. "Optimization in Reproducing Kernel Hilbert Spaces of Spike Trains," Springer Optimization and Its Applications, in: Wanpracha Chaovalitwongse & Panos M. Pardalos & Petros Xanthopoulos (ed.), Computational Neuroscience, chapter 0, pages 3-29, Springer.
    • Handle: RePEc:spr:spochp:978-0-387-88630-5_1
    DOI: 10.1007/978-0-387-88630-5_1
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