About LINE INTEGRATION WITH RECTANGULAR PATH AROUND POLE
Line Integration With Rectangular Path Around Pole (U+2A12) is a Unicode math symbol from the Supplemental Mathematical Operators block. It resides on Plane 0 (BMP, Basic Multilingual Plane), has bidirectional class ON (other neutrals), is mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as ⨒ or ⨒.