Karl Heun (born 3 April 1859, Wiesbaden, died 10 Jan 1929, Karlsruhe) was a German mathematician who introduced Heun's equation, Heun functions, and Heun's method.

References

* Renteln, M. von (1995), "Karl Heun - his life and his scientific work", in Ronveaux, A., Heun's differential equations, Oxford Science Publications, The Clarendon Press Oxford University Press, pp. XVII-XX, MR1392976, ISBN 978-0-19-859695-0
* O'Connor, John J.; Robertson, Edmund F., "Karl Heun", MacTutor History of Mathematics archive, University of St Andrews, http://www-history.mcs.st-andrews.ac.uk/Biographies/Heun.html .