Superset Symbol ⊃

Superset Symbol is ⊃, U+2283 SUPERSET OF. In a statement such as A ⊃ B, the set on the left contains the set on the right. Whether the notation is intended as a strict superset must be established by the author’s convention. Examples include “ℝ ⊃ ℤ” and the paired relation “B ⊂ A.” Use ⊇ when the notation explicitly allows equality. A proof or textbook should define the chosen subset and superset convention because older sources do not always use the same strictness. Place ⊃ between set expressions. It is not an equals sign, a greater-than sign, or a logical implication arrow. The direction matters: reversing A and B reverses the containment statement. Set names, braces, and surrounding definitions should make the objects being compared clear. Copy the exact U+2283 character rather than typing a curved bracket or improvised greater-than mark. In accessible mathematics, a reading such as “A is a superset of B” conveys the relation more reliably than the glyph alone. For HTML, use literal UTF-8 ⊃, decimal ⊃, or hexadecimal ⊃. This page covers the set-containment operator; ordinary equality = and superset-or-equal ⊇ are separate relations. Recopy the sample “Accessible reading: A is a superset of B,” confirm the final text still contains U+2283, and check that the visible heading names Superset. This final check protects Superset Symbol from font substitution, accidental character loss, and intent drift.