Genericity and UD-random reals

نویسندگان

  • WESLEY CALVERT
  • JOHANNA N.Y. FRANKLIN
چکیده

Avigad introduced the notion of UD-randomness based in Weyl’s 1916 definition of uniform distribution modulo one. We prove that there exists a weakly 1-random real that is neither UD-random nor weakly 1-generic. We also show that no 2-generic real can Turing compute a UD-random real. 2000 Mathematics Subject Classification 03D32 (primary); 03D80 (secondary)

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Uniform distribution and algorithmic randomness

Abstract. A seminal theorem due to Weyl [14] states that if (an) is any sequence of distinct integers, then, for almost every x ∈ R, the sequence (anx) is uniformly distributed modulo one. In particular, for almost every x in the unit interval, the sequence (anx) is uniformly distributed modulo one for every computable sequence (an) of distinct integers. Call such an x UD random. Here it is sho...

متن کامل

Lowness for Kurtz randomness

We prove that degrees that are low for Kurtz randomness cannot be diagonally non-recursive. Together with the work of Stephan and Yu [16], this proves that they coincide with the hyperimmune-free non-DNR degrees, which are also exactly the degrees that are low for weak 1-genericity. We also consider Low(M, Kurtz), the class of degrees a such that every element of M is a-Kurtz random. These are ...

متن کامل

A Model of the Axiom of Determinacy in Which Every Set of Reals Is Universally Baire (draft)

The consistency of the theory ZF+AD+“every set of reals is universally Baire” is proved relative to ZFC + “there is a cardinal λ that is a limit of Woodin cardinals and of strong cardinals.” The proof is based on the derived model construction, which was used by Woodin to show that the theory ZF+AD+“every set of reals is Suslin” is consistent relative to ZFC+“there is a cardinal λ that is a lim...

متن کامل

The Extender Algebra and Vagaries of Σ 21 Absoluteness Philipp

We review the construction of the extender algebra, a Boolean algebra which is due to Woodin, with δ-many generators. The resulting genericity iteration is applied to prove a new Σ1-absoluteness theorem for c.c.c. forcings with ordinal parameters. Additionally we introduce and discuss sets that extend to a class with unique condensation. We analyse the sets that extend to classes with unique co...

متن کامل

Relative Genericity in The 12 Degrees

This paper explores how many 12 degrees a 1 0 2 real can be simultaneously 1-generic over or simultaneously 1-random over. The two cases, it turns out, are quite different. Theorem 2 shows that given an r.e. real and a collection of reals uniformly recursive in it, the r.e. real bounds a real that is 1-generic over every strictly ≤T-smaller real in the collection. As a corollary, if S is a univ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2015