gcd

Scilab Function
Last update : 02/06/2004

gcd - gcd calculation

### Calling Sequence

  `[pgcd,U]=gcd(p)`

### Parameters

- `p` : polynomial row vector `p=[p1,..,pn]` or integer row vector (type equal to 8)

### Description

computes the gcd of components of `p` and a unimodular matrix (with polynomial inverse) `U` , with minimal degree such that

`p*U=[0 ... 0 pgcd]`

### Examples

    //polynomial case
    s=poly(0,'s');
    p=[s,s*(s+1)^2,2*s^2+s^3];
    [pgcd,u]=gcd(p);
    p*u

    //integer case
    V=int32([2^2*3^5, 2^3*3^2,2^2*3^4*5]);
    [thegcd,U]=gcd(V)
    V*U

### See Also

`bezout` , `lcm` , `hermit` ,