olemus
kompleksarv, mis on väljendatav
reaalarvu ja imaginaarühiku i = √-1 korrutisena
= a real number multiplied by the imaginary unit i = √-1

ülevaateid
https://betterexplained.com/articles/a-visual-intuitive-guide-to-imaginary-numbers/

https://en.wikipedia.org/wiki/Imaginary_number

https://journals.indexcopernicus.com/api/file/viewByFileId/659813.pdf

rakendusi
http://www2.dsu.nodak.edu/users/mberg/Imaginary/imaginary.htm