Inverses and determinants of matrices are closely related and come up in many different contexts. In these notes we will develop some basics of the theory of these ideas. Our initial motivation is the solution of systems of linear equations, such as 2x − 5y + 4z = −3 x − 2y + z = 5 x − 4y + 6z = 10. To solve the system, we want to manipulate these equations to get new equations which only conta...

Moral Awareness and Animal Welfare - D Lamb (2022). Published by Ethics International Press Ltd, Carlton House, Bradford BD1 4NS, UK. 376 pages. Hardback (ISBN: 978-1-80441-024-0). Price £79.99. Volume 32

Crude extracts of three actinomycetes species belonging to Saccharopolyspora (TR 046 and TR 039) and Actinosynnema (TR 024) genera were screened for antibacterial activities against a panel of several bacterial strains. The extracts showed antibacterial activities against both gram-negative and gram-positive test bacteria with inhibition zones ranging from 8 to 28 mm (TR 046); 8 to15 mm (TR 039...