On the model companion of partial differential fields with an automorphism
نویسندگان
چکیده
منابع مشابه
The Model Companion of differential Fields with Free operators
A model companion is shown to exist for the theory of partial differential fields of characteristic zero equipped with free operators that commute with the derivations. The free operators here are those introduced in [R. Moosa and T. Scanlon, Model theory of fields with free operators in characteristic zero, Preprint 2013]. The proof relies on a new lifting lemma in differential algebra: a diff...
متن کاملModel Companion of Ordered Theories with an Automorphism
Kikyo and Shelah showed that if T is a theory with the Strict Order Property in some first-order language L, then in the expanded language Lσ := L ∪ {σ} with a new unary function symbol σ, the bigger theory Tσ := T ∪ {“σ is an L-automorphism”} does not have a model companion. We show in this paper that if, however, we restrict the automorphism and consider the theory Tσ as the base theory T tog...
متن کاملthe effect of using model essays on the develpment of writing proficiency of iranina pre-intermediate efl learners
abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...
construction of vector fields with positive lyapunov exponents
in this thesis our aim is to construct vector field in r3 for which the corresponding one-dimensional maps have certain discontinuities. two kinds of vector fields are considered, the first the lorenz vector field, and the second originally introced here. the latter have chaotic behavior and motivate a class of one-parameter families of maps which have positive lyapunov exponents for an open in...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Israel Journal of Mathematics
سال: 2016
ISSN: 0021-2172,1565-8511
DOI: 10.1007/s11856-016-1292-y