external binary operation

function f: R × S → S or f: S × R → S

en-GB/ɪkˈstɜːnl baɪnəɹiː ˌɒpəˈɹeɪʃən/
en-US/ɪkˈstɝnəl ˈbaɪnɚi ˌɑpɚˈeɪʃən/

Categorias:

law of compositionbinary operationbinary function that is not an internal binary operation