Numerical computations

Note that the real number 10^{-4} is an exact number but
1*e* - 4 is an approximate representation of this number.

- Floating point representation.
- Digits
- Representation by hardware floats
- Examples of representations of normalized floats
- Difference between the representation of (3.1-3) and of 0.1

- Approx. evaluation :
`evalf approx`and`Digits` - Numerical algorithms
- Approximate solution of an equation :
`newton` - Approximate computation of the derivative number :
`nDeriv` - Approximate computation of integrals :
`romberg nInt` - Approximate solution of y'=f(t,y) :
`odesolve` - Approximate solution of the system v'=f(t,v) :
`odesolve`

- Approximate solution of an equation :
- Solve equations with
`fsolve nSolve``fsolve`or`nSolve`with the option`bisection_solver``fsolve`or`nSolve`with the option`brent_solver``fsolve`or`nSolve`with the option`falsepos_solver``fsolve`or`nSolve`with the option`newton_solver``fsolve`or`nSolve`with the option`secant_solver``fsolve`or`nSolve`with the option`steffenson_solver`

- Solve systems with
`fsolve``fsolve`with the option`dnewton_solver``fsolve`with the option`hybrid_solver``fsolve`with the option`hybrids_solver``fsolve`with the option`newtonj_solver``fsolve`with the option`hybridj_solver``fsolve`with the option`hybridsj_solver`

- Numeric roots of a polynomial :
`proot` - Numeric factorization of a matrix :
`cholesky qr lu svd`

giac documentation written by Renée De Graeve and Bernard Parisse