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14 results on '"Babarinsa, Olayiwola"'

1. Examination Timetable Scheduling Using Graph Coloring for Faculty of Science

Author

Abosede Oke, Adamu Wakili, and Babarinsa Olayiwola

Abstract

Graph coloring is an important aspect of graph theory with great application in University timetable scheduling. The examination timetable scheduling maximizes the time and minimizes resources (venue and invigilators) to give effective output of the event. The constraint based approach method is implemented in scheduling examination timetable for Faculty of Science, Federal University Lokoja. Then the results on thirteen (13) departments give a 3-timeslot within twelve (12) days examination period with no students having two (2) examinations per day. In all, there is no conflict of venues and courses thereby giving an efficient scheduling process for the entire examination.

Published
2023

2. On Determinant of Laplacian Matrix and Signless Laplacian Matrix of a Simple Graph

Author

Babarinsa, Olayiwola, Kamarulhaili, Hailiza, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Arumugam, S., editor, Bagga, Jay, editor, Beineke, Lowell W., editor, and Panda, B.S., editor

Published
2017
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4. Some New Results on Hourglass Matrices.

Author

Bashir, Dlal, Kamarulhaili, Hailiza, and Babarinsa, Olayiwola

Subjects
SCHUR complement, MATRIX decomposition, FACTORIZATION
Abstract

An hourglass matrix is a nonsingular matrix obtained from quadrant interlocking factorization called WH factorization. In this paper, we establish the determinant of hourglass matrix and show its application in the triangular blocks of hourglass matrix called Hsystem. Therefore, WH factorization exists for every nonsingular matrix and hence its Schur complement exists for every Hsystem. [ABSTRACT FROM AUTHOR]

Published
2023

7. NOTE ON THE HISTORY OF (SQUARE) MATRIX AND DETERMINANT

Author

Babarinsa, Olayiwola, primary, Sofi, Azfi Zaidi Mohammad, additional, Mohd, Asrul Hery, additional, Eluwole, Akinola, additional, Sunday, Imoni, additional, Adamu, Wakili, additional, Onojhojobi, Benson, additional, Sheidu, Momoh, additional, Kehinde, Rotimi, additional, Daniel, Lanlege, additional, Dolapo, Shobanke, additional, Edogbanya, Helen Olaronke, additional, Oyem, Anselm, additional, Adeniyi, Isaac, additional, Ezenweke, Chinenye, additional, Umaru, Sani, additional, Emmanuel, Sabastine, additional, Bitrus, Kefas, additional, Cyril-Okeme,, Veronica, additional, Upahi, Eunice, additional, Akaligwo, Emmanuel Akaligwo, additional, Arinze, Luke, additional, Barguma, Simon, additional, Edibo, Friday, additional, Atteh, Mayowa, additional, Idoko, Alloy, additional, Opeyemi, Enoch, additional, Adesanmi, Mogbademu, additional, Ojo, Olaitan, additional, Disu, Akeem, additional, Adeeko, Tajudeen, additional, Anukwu, Geraldine, additional, Samson, Damilola, additional, Ogunleye, Kunle, additional, Koffa, Jude, additional, James, Ojonubah, additional, Musa, Marut, additional, Choji, Niri Martha, additional, Emeka, Helen Oluyemisi, additional, Umar, Adamu, additional, Hassan, Mansur, additional, Jaiyeoba, Oluwaseyi, additional, Aidara, Shamsoudine, additional, Mamman, Mamuda, additional, Manga, Edna, additional, Sule, Amiru, additional, Uyimwen, Osagie, additional, Ahmed, Abdullah-al-Musa, additional, Garba, Zaku, additional, Gbene, Zaato, additional, Jubri, Sanusi, additional, and Okeke, Godwin, additional

Published
2022
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9. A Review on Quadrant Interlocking Factorization: WZ and WH Factorization.

Author

Bashir, Dlal, Kamarulhaili, Hailiza, and Babarinsa, Olayiwola

Subjects
FACTORIZATION, LINEAR systems, PARALLEL computers, COMPUTER algorithms, GRAPH theory
Abstract

Quadrant Interlocking Factorization (QIF), an alternative to LU factorization, is suitable for factorizing invertible matrix A such that det(A), 0. The QIF, with its application in parallel computing, is the most efficient matrix factorization technique yet underutilized. The two forms of QIF among others, which are not only similar in algorithm but also in computation, are WZ factorization and WH factorization yet differs in applications and properties. This review discusses both the old form of QIF, called WZ factorization, and the latest form of QIF, called WH factorization, with an example and open questions to further the studies between the two factorization techniques. [ABSTRACT FROM AUTHOR]

Published
2023
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12. Mixed Hourglass Graph.

Author

Babarinsa, Olayiwola and Kamarulhaili, Hailiza

Subjects
*WEIGHTED graphs, *COMPLETE graphs, *PROJECTIVE planes
Abstract

This article discusses a mixed graph called mixed hourglass graph. The adjacency of a mixed hourglass graph is coined from an hourglass matrix in which the matrix is obtained from quadratic interlocking factorization. Mixed hourglass graph is a weighted graph with loops, but replacing the weights of the graph with 1’s produce an unweighted mixed hourglass graph or simply mixed hourglass graph. Then the total number of arcs and edges and the spanning subgraph of mixed hourglass graph are examined to infer that the graph is a complete mixed graph and acyclic graph. [ABSTRACT FROM AUTHOR]

Published
2019
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