BACKGROUND The strikingly young age of new variant Creutzfeldt-Jacob disease (vCJD) cases remains unexplained. Age dependent susceptibility to infection has been put forward, but differential dietary exposure to contaminated food products in the UK population according to age and sex during the bovine spongiform encephalopathy (BSE) epidemic may provide a simpler explanation. METHODS Using re...

The Boston Evening Transcript del Rubén Jacob (1939-2010)

I discuss the problem of realizing families of complex orientable homology theories as families of E ∞-ring spectra, including a recent result of Jacob Lurie emphasizing the role of p-divisible groups. A few years ago, I wrote a paper [10] discussing a realization problem for families of Landweber exact spectra. Since Jacob Lurie [27] now has a major positive result in this direction, it seems ...