# System.Numerics Namespace

**.NET Framework 4.6 and 4.5**

The System.Numerics namespace contains numeric types that complement the numeric primitives, such as Byte, Double, and Int32, that are defined by the .NET Framework.

Structure | Description | |
---|---|---|

BigInteger | Represents an arbitrarily large signed integer. | |

Complex | Represents a complex number. | |

Matrix3x2 | Represents a 3x2 matrix. | |

Matrix4x4 | Represents a 4x4 matrix. | |

Plane | Represents a three-dimensional plane. | |

Quaternion | Represents a vector that is used to encode three-dimensional physical rotations. | |

Vector2 | Represents a vector with two single-precision floating-point values. | |

Vector3 | Represents a vector with three single-precision floating-point values. | |

Vector4 | Represents a vector with four single-precision floating-point values. |

This namespace includes the following types:

The BigInteger structure, which is a nonprimitive integral type that supports arbitrarily large integers. An integral primitive such as Byte or Int32 includes a

**MinValue**and a**MaxValue**property, which define the lower bound and upper bound supported by that data type. In contrast, the BigInteger structure has no lower or upper bound, and can contain the value of any integer.The Complex structure, which represents a complex number. A complex number is a number in the form

*a*+*b*i, where*a*is the real part, and*b*is the imaginary part.The SIMD-enabled vector types, which include Vector2, Vector3, Vector4, Matrix3x2, Matrix4x4, Plane, and Quaternion.