About WHITE TRIANGLE CONTAINING SMALL WHITE TRIANGLE
White Triangle Containing Small White Triangle (U+27C1) is a Unicode math symbol from the Miscellaneous Mathematical Symbols-A block. It resides on Plane 0 (BMP, Basic Multilingual Plane), has bidirectional class ON (other neutrals), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as ⟁ or ⟁.