⟨ ⟩Angle brackets are used as delimiters in mathematical expressions, often to denote inner products, sequences, or tuples.
Inner product of vectors a and b
\langle a, b \rangleA sequence or tuple of numbers
\langle 1, 2, 3 \rangleSet notation for elements x such that x is greater than 0
\langle x | x > 0 \rangle