The Fortress Language Specification - CiteSeerX

The following two operators have the same precedence and may be mixed.
U+229E SQUARED PLUS ⊞ BOXPLUS
U+229F SQUARED MINUS ⊟ BOXMINUS
They each have lower precedence than any of these multiplication or division operators:
U+22A0 SQUARED TIMES ⊠ BOXTIMES
U+22A1 SQUARED DOT OPERATOR ⊡ BOXDOT
U+29C4 SQUARED RISING DIAGONAL SLASH
BOXSLASH
U+29C6 SQUARED ASTERISK
BOXAST
These are other miscellaneous addition and subtraction operators:
U+00B1 PLUS-MINUS SIGN ±
U+2213 MINUS-OR-PLUS SIGN ∓
U+2242 MINUS TILDE
U+2A22 PLUS SIGN WITH SMALL CIRCLE ABOVE
◦
+
U+2A23 PLUS SIGN WITH CIRCUMFLEX ACCENT ABOVE ˆ+
U+2A24 PLUS SIGN WITH TILDE ABOVE
∼
+
U+2A26 PLUS SIGN WITH TILDE BELOW
+
∼
U+2A27 PLUS SIGN WITH SUBSCRIPT TWO + 2
U+2A28 PLUS SIGN WITH BLACK TRIANGLE
,
U+2A29 MINUS SIGN WITH COMMA ABOVE
−
U+2A2B MINUS SIGN WITH FALLING DOTS
U+2A2C MINUS SIGN WITH RISING DOTS
U+2A2D PLUS SIGN IN LEFT HALF CIRCLE
U+2A2E PLUS SIGN IN RIGHT HALF CIRCLE
F.3.3
Miscellaneous Arithmetic Operators
The operators MAX, MIN, REM, MOD, GCD, LCM, CHOOSE, and per, none of which corresponds to a single Unicode
character, are considered to be arithmetic operators, having higher precedence than certain relational operators, as
described in a later section.
F.3.4
Set Intersection, Union, and Difference
The following are the set intersection operators:
U+2229 INTERSECTION ∩ CAP INTERSECT
U+22D2 DOUBLE INTERSECTION ⋓ CAPCAP
U+2A40 INTERSECTION WITH DOT
U+2A43 INTERSECTION WITH OVERBAR
∩
U+2A44 INTERSECTION WITH LOGICAL AND
U+2A4B INTERSECTION BESIDE AND JOINED WITH INTERSECTION
U+2A4D CLOSED INTERSECTION WITH SERIFS
U+2ADB TRANSVERSAL INTERSECTION
The following are the set union operators:
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