Showing math.DSShow all
3 papers · 1 filter
math.DS2024
A Maximum Modulus Theorem for functions admitting Stokes phenomena, and specific cases of Dulac's Theorem
Jesús Palma-Márquez, Melvin Yeung
We study large classes of real-valued analytic functions that naturally emerge in the understanding of Dulac's problem, which addresses the finiteness of limit cycles in planar dif…
math.DS2024
Natural levels in return maps of elementary polycycles
Melvin Yeung
We will provide a proof of a known specific case of Dulac's Theorem in the style of Ilyashenko. From this we derive a quasi-analyticity result for some return maps of polycycles an…
math.DS2024
On the monograph "Finiteness Theorems for limit cycles" and a special case of alternant cycles
Melvin Yeung
We provide evidence that the approach of [Ilyashenko 1991] to the proof of Dulac's theorem has a gap. Although the asymptotics of [Ilyashenko 1991] capture far more than the asympt…