Lawvere on probability distributions as a monad

[Jeremy Gibbons <jeremy.gibbons@comlab.ox.ac.uk>]

I wonder if you fine categorists could help me track down an old
preprint?

Many people have written about probability distributions forming a
monad (and so probabilistic computations can be captured as a
"computational effect"). The reference trail goes back to

    Michele Giry, "A Categorical Approach to Probability Theory", LNM
915:68-85, 1981

and thence to

    F W Lawvere, "The Category of Probabilistic Mappings", preprint, 1962

I have Giry's paper, but can find no trace on the web of Lawvere's
preprint. Does anyone know where I might find a copy? Might someone
even have a copy that they would be prepared to scan?

Thanks,
Jeremy

Jeremy.Gibbons@comlab.ox.ac.uk
    Oxford University Computing Laboratory,    TEL: +44 1865 283508
    Wolfson Building, Parks Road,              FAX: +44 1865 283531
    Oxford OX1 3QD, UK.
    URL: http://www.comlab.ox.ac.uk/oucl/people/jeremy.gibbons.html





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