The syntax of an imperative language does not mention explicitly the state, while its denotational semantics has to mention it. In this paper we present a framework for the verification in Coq of properties of programs manipulating the global state effect. These properties are expressed in a proof system which is close to the syntax, as in effect systems, in the sense that the state does not ap...

The multiple-spiral medallions are beautiful decorations of the Mandelbrot set. Computer graphics provide an invaluable tool to study the structure of these decorations with central symmetry, formed by an infinity of baby Mandelbrot sets that have high periods. Up to now, the external arguments of the external rays landing at the cusps of the cardioids of these baby Mandelbrot sets could not be...

Within our long term interdisciplinary project Nasca/Palpa modern 3D data acquisition techniques were applied for different purposes successfully in the past, particularly for mapping of large and medium scale decorations found in the landscape such as the famous geoglyphs in the Palpa and Nasca regions as well as the petroglyphs of Chichictara. Archaeologists involved in research on the Nasca ...

Modern software development increasingly often takes place in geographically distributed contexts involving multiple development groups with different backgrounds and roles. Part or most of software systems is provided through COTS components, Open Source, outsourcing, multi-party collaboration and distributed development teams. The software architecture plays an increasingly important role to ...

The polymorphically typed functional core language LRP is a lambda calculus with recursive let-expressions, data constructors, case-expressions, and a seq-operator that uses call-by-need evaluation. In this work LRP is extended by scoped work decorations to ease computations when reasoning on program improvements. The considered language LRPw extends LRP by two constructs to represent work (i.e...

We prove that every 2d-regular unimodular random network carries an invariant Schreier decoration. Equivalently, it is the coset graph of subgroup free group F d . As a corollary we get graphing local isomorphic image coming from p.m.p. action

The main goal is to find the Homfly polynomial of a link formed by decorating each component of the Hopf link with the closure of a directly oriented tangle. Such decorations are spanned in the Hom-fly skein of the annulus by elements Q λ , depending on partitions λ. We show how the 2-variable Homfly invariant λ, µ of the Hopf link arising from decorations Q λ and Q µ can be found from the Schu...

according to technical presages, in the preliminary studies, we have found that there are at least 12 different kinds of stucco decorations belonging to the islamic periods of iran. technical executive details in each kind of these decorations depending on composition and method of treatment, manner of forming, and measure of relieve are different. unlike two common categorizations which are ba...

We consider magnetic Schrödinger operators on quantum graphs with identical edges. The spectral problem for the quantum graph is reduced to the discrete magnetic Laplacian on the corresponding combinatorial graph and a certain Hill equation. This may be viewed as a generalization of the classical spectral analysis for the Hill operator to such structures. Using this correspondence we show that ...