Sökning: "iterating function"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden iterating function.

  1. 1. Implementation of Dyson equation to accelerate convergence in RS-LMTO-ASA code

    Master-uppsats, Uppsala universitet/Materialteori

    Författare :Elis Uebel; Viktor Frilén; [2024]
    Nyckelord :Density functional theory; Dyson equation;

    Sammanfattning : First-principle calculations is a key ingredient for us to understand, improve and design new materials. Density functional theory (DFT) [1] has proven to be a very powerful tool and a number of different versions exist depending on the problem at hand. LÄS MER

  3. 2. A Borel-Cantelli lemma for non-stationary dynamical systems

    Master-uppsats, Lunds universitet/Matematik LTH

    Författare :Teodor Åberg; [2023]
    Nyckelord :Borel-Cantelli lemmas; Dynamical systems; Mathematics and Statistics;

    Sammanfattning : In this thesis we present a Borel–Cantelli lemma for dynamical systems such that the dynamics driving the system varies with time. These results are largely based on a decomposition of transfer operators produced by Rychlik. Some limitations on the structure of sequences that is necessary for the results is given some discussion. LÄS MER

  4. 3. On Pollard's rho method for solving the elliptic curve discrete logarithm problem

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för matematik (MA)

    Författare :Jenny Falk; [2019]
    Nyckelord :elliptic curves; Pollard s rho method; elliptic curve discrete logarithm problem; cryptography; adding walk; mixed walk; cycle-detecting algorithm; iterating function; random walk;

    Sammanfattning :     Cryptosystems based on elliptic curves are in wide-spread use, they are considered secure because of the difficulty to solve the elliptic curve discrete logarithm problem. Pollard's rho method is regarded as the best method for attacking the logarithm problem to date, yet it is still not efficient enough to break an elliptic curve cryptosystem. LÄS MER

  5. 4. Geo-process lookup management

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Datavetenskap

    Författare :Andreas Hägglund; [2017]
    Nyckelord :DHT; Distributed hash table; Geohash; lookup; Geographical search;

    Sammanfattning : This thesis presents a method to deploy and lookup applications and devices based on a geographical location. The proposed solution is a combination of two existing technologies, where the first one is a geocode system to encode latitude and longitude coordinates, and the second one is a Distributed Hash Table (DHT) where values are stored and accessed with a $<$key,value$>$ pair. LÄS MER

  7. 5. Crypto analysis and its applications to password hashing

    Master-uppsats, KTH/Kommunikationssystem, CoS

    Författare :Jens Christian Hillerup; [2013]
    Nyckelord :;

    Sammanfattning : Hash functions are a type of mathematical function that takes an input of arbitrary length and gives an output of fixed length, called a hash value. Many consider hash values to be sort of a “fingerprint” of some data, since they can be assumed to have unique outputs for any possible input. LÄS MER