| eigensystem | |
| eigenvalue | |
| eigenvector | |
| elliptic | elliptic EllipticE, EllipticK, dn_, ell_am, ell_e, ell_f, ellip2_e, ellip2_k, ellip_e, ellip_k, elliptic |
| emacs | |
| enquire | |
| environment | cd, get_env |
| erfc | erfc |
| error | error batch, catch, dbexit, erfc_nr, error, exit, fil_cheby1, fitpol, fitrat, fits, fits_open, include, jr, ln_gamma, lngamma, make, mnbrent, mxbrent, openb_hooks, pleb, rk_integrate, rkutta, scalar |
| euler | |
| exponential | exp, ipq_setup, random_ipq |
| extrapolation | MultiFile |