noncommutative
Mathematics term describing an operation where the order of operands matters (a·b ≠ b·a). Used in contexts like noncommutative algebra or geometry.
Matrix multiplication is generally noncommutative.
Noncommutative geometry is a branch of mathematics.
noncommutative geometry; NCG
non-Abelian gauge theory
Compound of 非 (hi, 'non-') and 可換 (kakan, 'commutative'). 可換 itself is a Sino-Japanese term combining 可 (ka, 'possible') and 換 (kan, 'exchange').