*Plus* investigating the mathematics of sound waves.

*Plus* is edited entirely by women who are happily disregarding gender stereotypes, so we're always happy to highlight women's achievements in maths. We've got lots of content by or about women mathematicians on *Plus* and here are some of our favourites. (And we'd like to ask all remaining dinosaurs to stop sending us emails starting "Dear Sirs"...)

Some mathematical heroines from the past:

- Ada Lovelace - visions of today
- Florence Nightingale: The compassionate statistician
- Against the odds — an article on Emmy Noether
- Female struggle — introducing four pioneering female mathematicians.

Some present-day mathematical heroines from our careers library:

- Marta Sanz-Solé: President of the European Mathematical Society
- Helen Joyce: Brazil correspondent, The Economist
- Sandy Black: Fashion designer
- Victoria Gould: Actor and mathematician
- Emily Poskett: Government statistician
- Tanya Morton: Application engineering manager, MathWorks
- Claudia Centazzo: Business development manager

Articles by and about mathematical heroines from the present:

- Supergravity to the rescue? Meet Renata Kallosh (you can also listen to this interview as a podcast)
- Colva Roney-Dougal on the power of groups
- Carola Schönlieb on digital image restoration
- Sara Garner on evaluating medical treatments
- Caroline Series on Non-Euclidean geometry and Indra's pearls
- Janna Levin on the topology and the Universe
- Carla Farsi on mathematics and art
- Josefina Alvarez on Google's search algorithm
- Joan Lasenby on maths and computer generated movies
- Abigail Kirk on Euler's polyhedron formula

You can listen to some conversations we've had with female mathematicians about their careers and roles in mathematics (these are podcasts):

*Plus*at the International Conference of Women Mathematicians — interviews with female mathematicians from around the world who attended the ICWM in India in 2010.- European women in mathematics — interviews with delegates of the European Women in Mathematics conference which took place in Cambridge in 2007.

And you can find out more about mathematical heroines past and present at the MacTutor History of Mathematics Archive and from Agnes Scott College.