her function

her function

[′her ‚fəŋk·shən]
(mathematics)
A function that is expressed in terms of Hankel functions in a manner similar to that in which the ber function is expressed in terms of Bessel functions.
References in classic literature ?
Kenn, whose delicate state of health, threatening to become confirmed illness through an attack of bronchitis, obliged her to resign her functions at the coming bazaar into the hands of other ladies, of whom she wished Lucy to be one.