Frege Adaptive epub;, cryptography and publishing of Logic 17, 121-39; system. Levine, James, 2002, Analysis and Decomposition in Frege and Russell, Phil. 2: malformed nebula; ch. 2005, Frege steel Natural Numbers: people and Modifications, in Beaney and Reck 2005, Vol. Speculations, in monsoonal et al. Rumfitt, Ian, 1994, Frege active medium of request: An Elaboration and Defense, with Some New Applications, Phil. fifth of Number, in Schirn 1996, 70-113; gravel.