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Geometric structures based on quaternions.
Floderová, Hana ; Vašík, Petr (referee) ; Hrdina, Jaroslav (advisor)
A pair (V, G) is called geometric structure, where V is a vector space and G is a subgroup GL(V), which is a set of transmission matrices. In this thesis we classify structures, which are based on properties of quaternions. Geometric structures based on quaternions are called triple structures. Triple structures are four structures with similar properties as quaternions. Quaternions are generated from real numbers and three complex units. We write quaternions in this shape a+bi+cj+dk.
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Tensor products of vector spaces
Řepík, Michal ; Jančařík, Antonín (advisor) ; Zhouf, Jaroslav (referee)
TENSOR PRODUCTS OF VECTOR SPACES Bachelor thesis Author: Michal Řepík Department: Department of Mathematics and Mathematical Edu- cation, Faculty of Education, Charles University in Pra- gue Supervisor: RNDr. Antonín Jančařík, Ph.D. Key words: Tensor product, tensor, bilinear map, free vector space, quotient space, change-to-base matrix. Abstract The submitted bachelor thesis called Tensor Products of Vector Spaces deals with general construction of tensor product of two vector spaces over the same field using the technique of linearisation of bilinear maps. This construction is supplemented by a discussion on its alternative ways, and a tensor product of a finite system of vector spaces over the same field is added. The paper also defines a (p, q) tensor in various interconnected ways. Basic operations with tensors are also introduced. The thesis offers a short historical review of tensor calculus as well.
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Usage of Markov chains in banking
Klímová, Hana ; Marada, Tomáš (advisor) ; Prášková, Zuzana (referee)
The aim of the thesis is to get acquainted with the theory of Markov chains and to show how it is used in banking for estimation of credit rating transitions. In the first part, an introduction to the theory of discrete-time and continuous-time Markov chain with discrete state space is provided. In the next part three estimating methods that are used to calculate credit rating transitions - namely cohort method, durability method and Aalen-Johansen estimator are described theoreticaly. In the last part these methods are applied to calculate the matrices of transition probabilities on the basis of real rating migrations. Next an empirical transition matrix is used to simulate set of rating progressions, which are then used for estimating the original matrix by all the above mentioned methods. Finally the distance between the original and estimated matrices is evaluated to show the differences between the methods.
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Tensor products of vector spaces
Řepík, Michal ; Jančařík, Antonín (advisor) ; Zhouf, Jaroslav (referee)
TENSOR PRODUCTS OF VECTOR SPACES Bachelor thesis Author: Michal Řepík Department: Department of Mathematics and Mathematical Edu- cation, Faculty of Education, Charles University in Pra- gue Supervisor: RNDr. Antonín Jančařík, Ph.D. Key words: Tensor product, tensor, bilinear map, free vector space, quotient space, change-to-base matrix. Abstract The submitted bachelor thesis called Tensor Products of Vector Spaces deals with general construction of tensor product of two vector spaces over the same field using the technique of linearisation of bilinear maps. This construction is supplemented by a discussion on its alternative ways, and a tensor product of a finite system of vector spaces over the same field is added. The paper also defines a (p, q) tensor in various interconnected ways. Basic operations with tensors are also introduced. The thesis offers a short historical review of tensor calculus as well.
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Usage of Markov chains in banking
Klímová, Hana ; Marada, Tomáš (advisor) ; Prášková, Zuzana (referee)
The aim of the thesis is to get acquainted with the theory of Markov chains and to show how it is used in banking for estimation of credit rating transitions. In the first part, an introduction to the theory of discrete-time and continuous-time Markov chain with discrete state space is provided. In the next part three estimating methods that are used to calculate credit rating transitions - namely cohort method, durability method and Aalen-Johansen estimator are described theoreticaly. In the last part these methods are applied to calculate the matrices of transition probabilities on the basis of real rating migrations. Next an empirical transition matrix is used to simulate set of rating progressions, which are then used for estimating the original matrix by all the above mentioned methods. Finally the distance between the original and estimated matrices is evaluated to show the differences between the methods.
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Geometric structures based on quaternions.
Floderová, Hana ; Vašík, Petr (referee) ; Hrdina, Jaroslav (advisor)
A pair (V, G) is called geometric structure, where V is a vector space and G is a subgroup GL(V), which is a set of transmission matrices. In this thesis we classify structures, which are based on properties of quaternions. Geometric structures based on quaternions are called triple structures. Triple structures are four structures with similar properties as quaternions. Quaternions are generated from real numbers and three complex units. We write quaternions in this shape a+bi+cj+dk.
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