The Klein j-Function is not Pfaffian over the Real Exponential Field
arXiv:2311.06980
Abstract
James Freitag showed that the Klein j-function is not paffian over the complex numbers. We expand on this result by showing that a restriction of the Klein j-function to the imaginary interval (0, i) is not pfaffian over the real field exponential field in the sense of Miller and Speissegger.
6 pages, Fixed proof of Theorem B and improved the Introduction