Total Curvature
The total curvature of a curve is the quantity 
, where 
is the Torsion and 
is the Curvature. The total curvature is also called the ThirdCurvature.
- Absolute Pseudoprime
- Absolute Square
- Absolute Value
- Absorption Law
- Abstraction Operator
- Abundance
- Abundant Number
- Acceleration
- Accidental Cancellation
- Accumulation Point
- Achilles and the Tortoise Paradox
- Ackermann Function
- Ackermann Number
- Acnode
- Acoptic Polyhedron
- Action
- Acute Angle
- Acute Triangle
- Adams-Bashforth-Moulton Method
- Adams' Method
- Addend
- Addition
- Addition Chain
- Addition-Multiplication Magic Square
- Additive Persistence