1Alaku Monday Abimiku,2Kyari Sunday Stephen  and 3Obed Thomas Akwana ABSTRACT In this paper we examined the signed transformation semigroup in order to derived the formula for counting the elements in signed order-decreasing and order-preserving, [   , |],  and it’s corresponding self-inverse elements ( ,     Keywords: Idempotent, Self-inverseRead More

Ebimobowei T. Yabefa ABSTRACT The present design and development of power supply systems for electronics appliances is a complex but sequential process, and the designer is to approach this process in a sequential and logical manner, considering the efficient performance and reliability of the system. The most important design taskRead More