ALGO-tag

 ALGO = Normal | VeryFast | Fast | All | Damped

Default: ALGO = Normal

only the first letter in the flag decides, which algorithm is used.

The ALGO tag is a convenient way to specify the electronic minimisation algorithm in VASP.4.5 and later versions.

ALGO = Normal will select, IALGO=38 (blocked Davidson block iteration scheme), whereas ALGO = Very_Fast will select IALGO=48 (RMM-DIIS). A faily robust mixture of both algorithm is selected for ALGO = Fast. In this case IALGO=38 is used for the initial phase, and then VASP switches to IALGO=48. For ionic step, one IALGO=38 sweep is performed.

The all band simultaneous update of wavefunctions can be selected using ALGO = All ( IALGO=58). A damped velocity friction algorithm is selected with ALGO = Damped ( IALGO=53). See next sections for details.