Rodney Nillsen PhD DSc, has had a wide experience of teaching, research, and exposition in mathematics over forty-plus years. As an undergraduate he studied mathematics, science and literature. He has research, teaching-related and educational publications across several areas. He has received formal recognition for the quality of his teaching and his international research. In mathematics and teaching, he has an interest going beyond technical details, considering underlying ideas investigated through applications and comparison with other areas of thought and knowledge. In teaching, he seeks to elicit learning and understanding, bringing out what is innate within the person. You can visit his website at https://documents.uow.edu.au/~nillsen/