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Annotation of 43BSD/usr.lib/learn/eqn/L7.1c, revision 1.1.1.1

1.1       root        1: #once #create message
                      2: .ND
                      3: .tr %$
                      4: .EQ
                      5: delim $$
                      6: .EN
                      7: .LP
                      8: It is also quite permissible to leave out
                      9: either the "from" part or the "to" part
                     10: of a from-to construction.  For example,
                     11: modify "Example" so its output looks like this,
                     12: then type "ready".
                     13: .pl 1
                     14: #once #create Ref
                     15: .LP
                     16: .EQ
                     17: lim from {x-> pi /2} ( tan~x) sup {sin~2x}~=~1
                     18: .EN
                     19: .pl 1
                     20: #once #create Example
                     21: .LP
                     22: .EQ
                     23: lim from xxx ( tan~x) sup {sin~2x}~=~1
                     24: .EN
                     25: .pl 1
                     26: #
                     27: #once neqn Ref | nroff >X1 &
                     28: #once neqn message Ref | nroff -T$term %s/tinyms -
                     29: #user
                     30: neqn Example | nroff >X2
                     31: #cmp X1 X2
                     32: #log
                     33: #next
                     34: 7.1d 10
                     35: 7.2c 5

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