Dr Alexander Farrugia, a senior lecturer at the Department of Mathematics, Junior College, has published the book But What is i, Exactly? Demystifying complex numbers, exponential functions and more on Amazon.
The author first started answering questions related to mathematics on Quora in the latter half of the twenty-tens, earning him the Quora Top Writer status in 2017 and 2018. He has selected some of his writings, comprising more than 3000 answers, and incorporated them into the book But What is i, Exactly?.
The book tackles the questions that are not dealt with in the A Level mathematics curriculum in a simple and approachable, yet detailed and precise manner. It is ideal for students who are currently pursuing, or intend to pursue, a mathematics undergraduate course, giving them a sound understanding of what they have learnt during their A Level mathematics. It is also a great reference book for mathematics educators teaching at A Level or early undergraduate level to supplement their teaching with material that their curriculum overlooks.