non-commutativity
/ˌnɒnkəˌmjuːtəˈtɪvɪti/ /nɒnˌkɒmjʊtəˈtɪvɪti/Mathematics
noun
The property of being non-commutative; = non-commutativeness.
Origin
Early 20th century; earliest use found in Transactions of the American Mathematical Society. From non- + commutativity, after non-commutative.