Scilab Function

%sn - Jacobi 's elliptic function

### Sequence d'appel

  `[y]=%sn(x,m)`

### Parametres

- `x` : a point inside the fundamental rectangle defined by the elliptic integral; `x` is a vector of complex numbers
- `m` : parameter of the elliptic integral (`0<m<1`)
- `y` : result

### Description

Jacobi 's sn elliptic function with parameter `m`: the inverse of the elliptic integral for the parameter `m`.

The amplitude am is computed in fortran and the addition formulas for elliptic functions are applied

### Exemples

    m=0.36;
    K=%k(m);
    P=4*K; //Real period
    real_val=0:(P/50):P;
    plot(real_val,real(%sn(real_val,m)))
    xbasc();
    KK=%k(1-m);
    Ip=2*KK;
    ima_val1=0:(Ip/50):KK-0.001;
    ima_val2=(KK+0.05):(Ip/25):(Ip+KK);
    z1=%sn(%i*ima_val1,m);z2=%sn(%i*ima_val2,m);
    plot2d([ima_val1',ima_val2'],[imag(z1)',imag(z2)']);
    xgrid(3)

### Voir aussi

`%asn` `%k`

### Auteur

F. D.