j-invariant

modular function of weight zero defined on the upper half-plane of complex numbers

en-GB/d͡ʒəiː - ɪnˈvɛəɹɪənt/
en-US/ˈd͡ʒeɪ - ˌɪnˈvɛɹiənt/

زمرے:

modular form