Mathematics Letters

Volume 8, Issue 2, June 2022

  • Common Fixed Point Theorems for Generalized R′-contraction in b-metric Spaces

    Soressa Wakesa Bekana

    Issue: Volume 8, Issue 2, June 2022
    Pages: 22-31
    Received: 26 February 2022
    Accepted: 8 April 2022
    Published: 22 April 2022
    DOI: 10.11648/j.ml.20220802.11
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    Abstract: In this paper, the researcher presents some common fixed point theorems for self-mappings satisfying generalized R′-contraction in b-metric spaces and obtained a unique common fixed point of a self-mapping satisfying certain contraction in the framework of b- metric spaces. The results presented over her generalize and extend some existing results ... Show More
  • Comparison of Results for Some Different Methods of Determination of Fundamental Matrix of Linear Control Systems

    Stephen Ekwueme Aniaku, Emmanuel Chukwudi Mbah, Christopher Chukwuma Asogwa

    Issue: Volume 8, Issue 2, June 2022
    Pages: 32-36
    Received: 11 March 2022
    Accepted: 1 April 2022
    Published: 28 July 2022
    DOI: 10.11648/j.ml.20220802.12
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    Abstract: In this paper, three different methods of determination of fundamental matrix of Linear control systems, when the coefficient matrix A is not a nilpotent matrix are compared. In the case where A is nilpotent, the calculation is straight forward and easy. It only needs the calculation of eAt: The methods compared, in the case of A not being nilpoten... Show More
  • Common Fixed Point Theorem for Four Self-Maps Satisfying (CLRST) Property for Generalized (ψ, φ) –Weakly Contraction in B-metric Space

    Soressa Wakesa Bekana

    Issue: Volume 8, Issue 2, June 2022
    Pages: 37-42
    Received: 8 June 2022
    Accepted: 16 September 2022
    Published: 8 December 2022
    DOI: 10.11648/j.ml.20220802.13
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    Abstract: This paper is devoted to obtain fixed point results. Fixed point theory is very wide field which have many application in different areas. The concept of altering distance to find fixed point results have been explored by many authors. In the present paper the author state altering distance function and ultra-altering distance function and the coin... Show More