PREC

PREC = [real] 

Default: PREC	= 2	hallo
	= 1	byebye
	= 2	if ICHARG=11

The precision tag

Intro

An equation

${\frac {e}{\pi }}=2y$

or an equation array

and set some tags into your INCAR file

PREC = A
GGA  = PE

And another section

and an array of equations

An eqnarray

${\begin{aligned}{\frac {e}{\pi }}&=\int _{\Omega }\psi (\mathbf {r} )d\mathbf {r} \\a&=b\\\end{aligned}}$

And again

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