Top 20 NuGet polynomial Packages

Class library implementing advanced mathematical algorithms, transforms, and time series manipulations. Implementations favour simplicity and correctness.
A symbolic, univariate, and generic (!) polynomial class. Generic means that the indeterminant can be of any arithmetic type, including the native value types (Double, Decimal, Int32, Int64, etc...), BigInteger, Complex, and even specialized numeric libraries such as BigRational, BigDecimal or BigCo...
A univariate, sparse, symbolic, BigInteger polynomial arithmetic class.
A collection of mathematical function and data structures written in C#. Numerical comparison, vector geometry, polynomial, root solver, statistics, GPS and clustering, and abstract bitmap and draw functions.
Package containing extensive mathematical capabilities for .NET including: Solution of mathematical expressions provided in string format with support for a large number of functions, operators, logical expressions and variables. Solution of systems of linear simultaneous equations. Polynomial curve...
SimpleML provides implementations of basic machine learning algorithms.
MathCore Library
The Boerman Math library containing some curve fitting things right now.