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Adjoint operator in probabilistic hilbert space

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  1. 1. Mathematical Theory and Modeling www.iiste.org ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online) Vol.4, No.8, 2014 10 Adjoint Operator in Probabilistic Hilbert Space Assit.Prof. Dr. Radhi I.M Dalia Sami Ali Department of Mathematic, College of Science for Women, University of Baghdad radi52@yahoo.com sm_dl016@yahoo.com Abstract: The purpose of this paper is to give a definition for the adjoint operator in Probabilistic Hilbert Space and its properties by using Riesz Representation Theorem. Keywords: Probabilistic Hilbert Space; Adjoint Operator; properties of adjoint operator. Introduction The notion of probabilistic inner product spaces can be considered as the generalization of that of inner product spaces. The definition of these spaces has been introduced in [1].Induced norms by these spaces may have very important applications in quantum particle physics particularly in connections with both string and E-infinity theories [2], [3]. The definition of probabilistic Hilbert Space also introduced in [4]. The definition of the adjoint operator in the ordinary Hilbert Space defined in many books and papers by many authors [5], [6].Self- adjoint operators are used in functional analysis and quantum mechanics. In quantum mechanics their importance lies in the Dirac–von Neumann formulation of quantum mechanics, in which physical observables such as position, momentum, angular momentum and spin are represented by self-adjoint operators on a Hilbert space. Our main purpose of this paper is how to give the definition for the adjoint operator in Probabilistic Hilbert Space and some of its properties by using the Riesz representation theorem that has been introduced in [4].We also published paper in the name (Some Results in Modified Probabilistic Hilbert Space) in Journal of the College Science for Women in 2014. 1. Basic definitions Definition (1-1) [1] Let ( ) , define the set D to be the set of all left continuous distributions such that: and let ( ) { be distribution function which belongs to D. Definition (1-2) [4] A convolution of two functions ( )( ) ∫ ( ) ( )
  2. 2. Mathematical Theory and Modeling www.iiste.org ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online) Vol.4, No.8, 2014 11 ∫ ( ) ( ) ( ) Definition (1-3) (PIP-space) [4] Let E be a real linear space and let then the Probabilistic inner product space is the triple ( ) where F is assumed to satisfy the following conditions:- ( ( ) will represent the value of ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) { ( ) ( ) ( ⁄ ) where h is real number, ( ⁄ )is the right hand limit of at ( ) ( ) ( )( ) Where ( )( ) ∫ ( ) ( ) Note: If ( ) ( ) ( ) ( ) { ( ) ( ) ( ⁄ )
  3. 3. Mathematical Theory and Modeling www.iiste.org ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online) Vol.4, No.8, 2014 12 ( ). Then ( ) is called Probabilistic Inner Product Space. Definition (1-4) [4] A PIP-space ( ) ∫ ( ) Theorem (1-5) [4] Let ( ) ∫ ( ) ( ) ( ) √ Note . Definition (1-6) [4] Let ( ) 1. A sequence ( ) ( ) ( ) 2. A linear functional ( ) Implies that ( ) ( ) 3. ( ) ( ) ( ) ( ) ( ) ( ) Definition (1-7) [4] Let( ) . If E is complete in , then E is called probabilistic Hilbert space, where √ . Theorem (1-8) [4]
  4. 4. Mathematical Theory and Modeling www.iiste.org ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online) Vol.4, No.8, 2014 13 Let( ) .For sequence ( √ ) implies . Theorem (1-9) [4] (Riesz Representation Theorem) Let ( ) be Probabilistic Hilbert Space, for any linear continuous functional ( ) ( ) ∫ ( ) 2. Main results In this section we will define the Adjoint operator in Probabilistic Hilbert Space by using Riesz representation theorem. Theorem (2-1) (Adjoint Operator in Probabilistic Hilbert Space) Let ( ) be Probabilistic Hilbert Space, Let such that: Proof: Fix ( ) ( ) ( ) ( ) ( ) ( ) Also is continuous Then by Riesz Representation theorem
  5. 5. Mathematical Theory and Modeling www.iiste.org ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online) Vol.4, No.8, 2014 14 ( ) ∫ ( ) Define So ( ) ∫ ( ) ( ) ∫ ( ) ∫ ( ) ∫ ( ) ∫ ( ) ∫ ( ) Uniqueness of the adjoint operator , Then ∫ ( ) ∫ ( ) ∫ ( ) ( )
  6. 6. Mathematical Theory and Modeling www.iiste.org ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online) Vol.4, No.8, 2014 15 So is unique. Theorem (2-2) Let ( ) be Probabilistic Hilbert Space, let be the adjoint operator of , then has the following properties: 1. ( ) Proof: ∫ ( ) ∫ ( ) ∫ ( ) ∫ ( ) ( )( ) ( )( ) So ( ) 2. ( ) Proof: ∫ ( ) ( ) ( ) ( ) ∫ ( ) ∫ ( ) ∫ ( ) ( ) By (1), (2) ( ) ( )
  7. 7. Mathematical Theory and Modeling www.iiste.org ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online) Vol.4, No.8, 2014 16 ( ) (( ) )( ) (( ) )( ) ( ) 3. ( ) Proof: ( ) ∫ ( ) ( ) ( ) ( ) ( ) ∫ ( ) ∫ ∫ ∫ ∫ ∫ ( ) ( ) ( ) ( ) By (1), (2) ( ) ( ) ( ) ( ) ( ) ( ) (( ) ( ))( ) (( ) ( ))( ) ( ) 4. ( ) ∫ ( ) ( ) ( ) ∫ ∫ ( )
  8. 8. Mathematical Theory and Modeling www.iiste.org ISSN 2224-5804 (Paper) ISSN 2225-0522 (Online) Vol.4, No.8, 2014 17 By (1), (2) ( ) ( ) ( ) (( ) )( ) (( ) )( ) ( ) Conclusion In this paper we tried to introduce a reasonable definition of the adjoint operator in probabilistic Hilbert Space. This definition can be extend as the extension of probabilistic Hilbert space. Also we proved some properties of the adjoint operator. References [1] C. Alsina, B. Schweizer, C. Sempi and A. Sklar, On the definition of a probabilistic inner product space, Rendiconti di Matematica, Serie VII, 17(1997), 115-127. [2] M. El-Naschie, On the uncertainty of Cantorian geometry and two-slit experiment, Chaos, Solutions and Fractals 9(1998), 517-529. 1, 1.1, 1.2, 1.3 [3] M. El-Naschie, On the unication of heterotic strings, M theory and ²1 theory, Chaos, Solitons and Fractals 11(2000), 2397-2408. [4] Y. Su, X. Wang and J. Gao, Riesz theorem in probabilistic inner product spaces, Int. Math. Forum., 62(2007), 3073-3078. 1.9 1.4, 1.5, 1.6 [5] Kreyszig, E.: Introductory Functional Analysis with Applications, Wiley, 1989. [6] Rudin, W.: Functional Analysis, McGraw-Hill Science, 1991
  9. 9. The IISTE is a pioneer in the Open-Access hosting service and academic event management. The aim of the firm is Accelerating Global Knowledge Sharing. More information about the firm can be found on the homepage: http://www.iiste.org CALL FOR JOURNAL PAPERS There are more than 30 peer-reviewed academic journals hosted under the hosting platform. Prospective authors of journals can find the submission instruction on the following page: http://www.iiste.org/journals/ All the journals articles are available online to the readers all over the world without financial, legal, or technical barriers other than those inseparable from gaining access to the internet itself. Paper version of the journals is also available upon request of readers and authors. MORE RESOURCES Book publication information: http://www.iiste.org/book/ IISTE Knowledge Sharing Partners EBSCO, Index Copernicus, Ulrich's Periodicals Directory, JournalTOCS, PKP Open Archives Harvester, Bielefeld Academic Search Engine, Elektronische Zeitschriftenbibliothek EZB, Open J-Gate, OCLC WorldCat, Universe Digtial Library , NewJour, Google Scholar
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