Unix/Linux Go Back    

Plan 9 - man page for eqn (plan9 section 1)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)

EQN(1)											   EQN(1)

delim $$

       eqn  - typeset mathematics

       eqn [ option ...  ] [ file ...  ]

       Eqn  is	a  troff(1)  preprocessor  for typesetting mathematics on a typesetter.  Usage is
       almost always

	      eqn file ... | troff

       If no files are specified, eqn reads from the standard input.  Eqn prepares output for the
       typesetter  named in the -Tdest option (default -Tutf; see troff(1)).  When run with other
       preprocessor filters, eqn usually comes last.

       A line beginning with .EQ marks the start of an equation; the end of an equation is marked
       by  a  line beginning with .EN.	Neither of these lines is altered, so they may be defined
       in macro packages to get centering, numbering, etc.  It is also possible to set two  char-
       acters  as `delimiters'; text between delimiters is also eqn input.  Delimiters may be set
       to characters x and y with the option -dxy or (more commonly) with delim  xy  between  .EQ
       and  .EN.   Left and right delimiters may be identical.	(They are customarily taken to be
       $font L "$$" )$.  Delimiters are turned off by All text that is neither between delimiters
       nor between .EQ and .EN is passed through untouched.

       Tokens  within  eqn are separated by spaces, tabs, newlines, braces, double quotes, tildes
       or circumflexes.  Braces {} are used for grouping; generally speaking, anywhere	a  single
       character  like	could  appear,	a complicated construction enclosed in braces may be used
       instead.  Tilde represents a full space in the output, circumflex half as much.

       Subscripts and superscripts are produced with the keywords sub and sup.	Thus makes $x sub
       i$, produces $a sub i sup 2$, and gives $e sup {x sup 2 + y sup 2}$.

       Over makes fractions: yields $a over b$.

       Sqrt produces square roots: results in $1 over sqrt {ax sup 2 +bx+c}$ .

       The  keywords  from and to introduce lower and upper limits on arbitrary things: $lim from
       {n -> inf} sum from 0 to n x sub i$ is made with

       Left and right brackets, braces, etc., of the right height are made with left  and  right:
       produces  $left	[  x  sup  2  +  y  sup  2 over alpha right ] ~=~1$.  The right clause is
       optional.  Legal characters after left and right are braces, brackets, bars, c and  f  for
       ceiling and floor, and "" for nothing at all (useful for a right-side-only bracket).

       Vertical  piles	of  things are made with pile, lpile, cpile, and rpile: produces $pile {a
       above b above c}$.  There can be an arbitrary number of elements in a pile.   lpile  left-
       justifies,  pile and cpile center, with different vertical spacing, and rpile right justi-

       Matrices are made with matrix: produces $matrix { lcol { x sub i above y sub 2 } ccol {	1
       above 2 } }$.  In addition, there is rcol for a right-justified column.

       Diacritical marks are made with prime, dot, dotdot, hat, tilde, bar, under, vec, dyad, and
       under: is $x sub 0 sup prime = f(t) bar + g(t) under$, and is $x vec = y dyad$.

       Sizes and fonts can be changed with prefix operators size n, size +-n, fat, roman, italic,
       bold,  or  font	n.   Size  and fonts can be changed globally in a document by gsize n and
       gfont n, or by the command-line arguments -sn and -fn.

       Normally subscripts and superscripts are reduced by 3 point sizes from the previous  size;
       this may be changed by the command-line argument -pn.

       Successive  display arguments can be lined up.  Place mark before the desired lineup point
       in the first equation; place lineup at the place that is to line up vertically  in  subse-
       quent equations.

       Shorthands  may	be  defined or existing keywords redefined with define: thing replacement
       defines a new token called thing which will be replaced by replacement whenever it appears
       thereafter.  The may be any character that does not occur in

       Keywords  like  (  sum ), ( int ), ( inf ), and shorthands like (>=), (->), and ( != ) are
       recognized.  Greek letters are spelled out in the desired  case,  as  in  or  Mathematical
       words like are made Roman automatically.  Troff(1) four-character escapes like (<=) can be
       used anywhere.  Strings enclosed in double quotes " " are passed through  untouched;  this
       permits keywords to be entered as text, and can be used to communicate with troff when all
       else fails.

	      font descriptions for PostScript


       troff(1), tbl(1)
       J. F. Ossanna and B. W. Kernighan, ``Troff User's Manual''.
       B. W. Kernighan and L. L. Cherry, ``Typesetting Mathematics--User's Guide'', Unix Research
       System Programmer's Manual, Tenth Edition, Volume 2.

       To embolden digits, parens, etc., it is necessary to quote them, as in delim off

Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums

All times are GMT -4. The time now is 11:27 PM.