Which weakly ramified group actions admit a universal formal deformation?

Jakub Byszewski; Gunther Cornelissen

Displaying similar documents to “Which weakly ramified group actions admit a universal formal deformation?”

Ramification and moduli spaces of finite flat models

Naoki Imai (2011)

Annales de l’institut Fourier

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We determine the type of the zeta functions and the range of the dimensions of the moduli spaces of finite flat models of two-dimensional local Galois representations over finite fields. This gives a generalization of Raynaud’s theorem on the uniqueness of finite flat models in low ramifications.

A minimal Set of Generators for the Ring of multisymmetric Functions

David Rydh (2007)

Annales de l’institut Fourier

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The purpose of this article is to give, for any (commutative) ring $A$ , an explicit minimal set of generators for the ring of multisymmetric functions ${T S}_{A}^{d} (A [x_{1}, \dots, x_{r}]) = {(A {[x_{1}, \dots, x_{r}]}^{\otimes_{A} d})}^{𝔖_{d}}$ as an $A$ -algebra. In characteristic zero, i.e. when $A$ is a $ℚ$ -algebra, a minimal set of generators has been known since the 19^th century. A rather small generating set in the general case has also recently been given by Vaccarino but it is not minimal in general. We also give a sharp degree bound on the generators, improving...

Local rings of order $p^{6}$ with 4-nilpotent Jacobson radical.

Zhuravlev, E.V. (2006)

Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]

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A singular initial value problem for second and third order differential equations

Wojciech Mydlarczyk (1995)

Colloquium Mathematicae

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Some properties of Noor integral operator of $(n + p - 1)$ -th order.

Aouf, M.K. (2009)

Matematichki Vesnik

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On the solvability of a nonlocal problem arising in dynamics of moisture transfer.

Bouziani, Abdelfatah (2003)

Georgian Mathematical Journal

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On some elementary properties of soluble groups of derived length 2.

Romanovskij, N. S., Timoshenko, E. I. (2003)

Sibirskij Matematicheskij Zhurnal

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An explicit formula for the Hilbert symbol of a formal group

Floric Tavares Ribeiro (2011)

Annales de l’institut Fourier

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A Brückner-Vostokov formula for the Hilbert symbol of a formal group was established by Abrashkin under the assumption that roots of unity belong to the base field. The main motivation of this work is to remove this hypothesis. It is obtained by combining methods of ( $ϕ, Γ$ )-modules and a cohomological interpretation of Abrashkin’s technique. To do this, we build ( $ϕ, Γ$ )-modules adapted to the false Tate curve extension and generalize some related tools like the Herr complex with explicit formulas...