Bertini 2 d882924 (2026-10-06 19:56 UTC)
Numerical algebraic geometry library (C++ core)
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bertini::system::Precon Struct Reference

A collection of preconstructed example systems, for tests and demonstrations. More...

#include <precon.hpp>

Static Public Member Functions

static System GriewankOsborn ()
 Creates the Griewank-Osborn system.
static System CrossedPaths ()
 Creates system with crossed paths at t = 1/3 and t = 2/3.
static System Sphere ()
 Constructs a system describing the 2-sphere, in variables x, y, z.

Detailed Description

A collection of preconstructed example systems, for tests and demonstrations.

Member Function Documentation

◆ CrossedPaths()

System bertini::system::Precon::CrossedPaths ( )
static

Creates system with crossed paths at t = 1/3 and t = 2/3.

From the returned system, you can unpack the variables, etc.

◆ GriewankOsborn()

System bertini::system::Precon::GriewankOsborn ( )
static

Creates the Griewank-Osborn system.

From the returned system, you can unpack the variables, etc.

◆ Sphere()

System bertini::system::Precon::Sphere ( )
static

Constructs a system describing the 2-sphere, in variables x, y, z.

System has one affine variable group: x, y, z; One function: x^2 + y^2 + z^2 - 1;