Plus or Minus
The symbol 
is used to denote a quantity which should be both added and subtracted, as in 
. The symbol can be usedto denote a range of uncertainty, or to denote a pair of quantities, such as the roots given by the Quadratic Formula
When order is relevant, the symbol
is also used, so an expression of the form 
is interpreted as 
or
. In contrast, the expression 
is interpreted to mean the set of four quantities 
, , , and 
.See also Minus, Minus Sign, Plus, Plus Sign, Sign- Cupolarotunda
- Curl
- Curlicue Fractal
- Curl Theorem
- Current
- Curtate Cycloid
- Curtate Cycloid Evolute
- Curvature
- Curvature Center
- Curvature Scalar
- Curvature Vector
- Curve
- Curve of Constant Breadth
- Curve of Constant Precession
- Curve of Constant Slope
- Curve of Constant Width
- Curvilinear Coordinates
- Cushion
- Cusp
- Cusp Catastrophe
- Cusp Form
- Cusp Map
- Cusp Point
- Cutting
- Cut-Vertex