diff options
Diffstat (limited to 'usr.bin/learn/lib/eqn/L5.1c')
| -rw-r--r-- | usr.bin/learn/lib/eqn/L5.1c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/usr.bin/learn/lib/eqn/L5.1c b/usr.bin/learn/lib/eqn/L5.1c new file mode 100644 index 00000000000..2b77825c26a --- /dev/null +++ b/usr.bin/learn/lib/eqn/L5.1c @@ -0,0 +1,40 @@ +#once #create message +.ND +.EQ +delim $$ +.EN +.LP +Braces are an exceedingly useful construction. +Wherever you have a place where you could have used +a single thing like the letter "x", you can plug in +anything in braces, and the whole thing will +be positioned properly. You can use braces with sub and sup +and over, and all the other magic words we +haven't seen yet. + +First let's use braces with "over". +Modify "Example" to produce this output, then +type "ready". +(Recall that $partial$ is called "partial".) +.pl 1 +#once #create Ref +.LP +.EQ +{partial y} over {partial x} ~=~ alpha over {alpha +1} +.EN +.pl 1 +#once #create Example +.LP +.EQ +replace me +.EN +.pl 1 +# +#once neqn Ref | nroff >X1 & +#once neqn message Ref | nroff -T$term %s/tinyms - +#user +neqn Example | nroff >X2 +#cmp X1 X2 +#log +#next +5.1d 10 |