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eqn.me revision 1.1 
      1 .nr _0 \n(c.
      2 .\" Copyright (c) 1988 The Regents of the University of California.
      3 .\" All rights reserved.
      4 .\"
      5 .\" Redistribution and use in source and binary forms, with or without
      6 .\" modification, are permitted provided that the following conditions
      7 .\" are met:
      8 .\" 1. Redistributions of source code must retain the above copyright
      9 .\"    notice, this list of conditions and the following disclaimer.
     10 .\" 2. Redistributions in binary form must reproduce the above copyright
     11 .\"    notice, this list of conditions and the following disclaimer in the
     12 .\"    documentation and/or other materials provided with the distribution.
     13 .\" 3. All advertising materials mentioning features or use of this software
     14 .\"    must display the following acknowledgement:
     15 .\"	This product includes software developed by the University of
     16 .\"	California, Berkeley and its contributors.
     17 .\" 4. Neither the name of the University nor the names of its contributors
     18 .\"    may be used to endorse or promote products derived from this software
     19 .\"    without specific prior written permission.
     20 .\"
     21 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24 .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31 .\" SUCH DAMAGE.
     32 .\"
     33 .\"	@(#)eqn.me	5.1 (Berkeley) 4/17/91
     34 .\"
     35 .\"	%beginstrip%
     36 .\"
     37 .de EQ			\" *** equation start
     38 .ec
     39 .if !\\n(?e \
     40 \{\
     41 .	if "\\n(.z"|e" .tm Line \\n(c. -- Nested .EQ request
     42 .	@D 1 "\\$1" "\\$2"
     43 .	@C 2
     44 .	di |e
     45 .\}
     46 .ls 1
     47 .in 0
     48 .nf
     49 ..
     50 .de EN			\" *** equation end
     51 .br
     52 .ie "\\$1"C" \
     53 \{\
     54 .	nr ?e 1
     55 .	sp \\n(esu
     56 .\}
     57 .el \
     58 \{\
     59 .	nr ?e 0
     60 .	di
     61 .	if \\n(dn \
     62 .		@q		\" actual equation output
     63 .	rm |e
     64 .	rm 10
     65 .	rm 11
     66 .	rm 12
     67 .	rm 13
     68 .	rm 14
     69 .	rm 15
     70 .	rm 16
     71 .	rm 17
     72 .	rm 18
     73 .	rm 19
     74 .	rm 20
     75 .	rm 21
     76 .	rm 22
     77 .	rm 23
     78 .	ev
     79 .\}
     80 ..
     81 .de @q			\" --- equation output
     82 .nr _Q \\n(dnu
     83 .ev
     84 .sp \\n(esu			\" output rest of preceeding text
     85 .@C 2				\" .ev 2 may be jumbled from header
     86 .ie \\n(_d=1 \
     87 .	in (\\n(.lu+\\n($iu-\\n(dlu)/2u
     88 .el .ie \\n(_d=2 \
     89 .	in \\n($iu
     90 .el .ie \\n(_d=3 \
     91 .	in \\n(biu+\\n($iu
     92 .el .if \\n(_d=4 \
     93 .	in 0
     94 .if !"\\n(.z"" \!.ne \\n(_Qu
     95 .ne \\n(_Qu+\n(.Vu		\" keep it on one page
     96 .mk _q
     97 .if \n@>1 .tm --@e: _Q=\\n(_Q _q=\\n(_q nl=\\n(nl |p=\\*(|p
     98 .if !"\\*(|p"" \
     99 \{\
    100 .	rs
    101 .	sp (\\n(_Qu-\\n(.vu)/2u
    102 .	tl """\\*(|p"
    103 .	rt \\n(_qu
    104 .\}
    105 .|e
    106 .sp |\\n(_qu+\\n(_Qu
    107 .sp \\n(esu+\\n(.Lv-1v
    108 .rr _q
    109 .rr _Q
    110 ..
    111 .nr c. \n(_0
    112