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Annotation of 43BSDTahoe/usr.lib/learn/eqn/L7.1b, revision 1.1

1.1     ! root        1: #once #create message
        !             2: .ND
        !             3: .tr %$
        !             4: .EQ
        !             5: delim $$
        !             6: .EN
        !             7: .LP
        !             8: As you might expect from our previous discussions,
        !             9: any part of a
        !            10: 
        !            11:   thing from thing to thing
        !            12: 
        !            13: construction can be as complicated as you wish.
        !            14: The only limitation is that the individual "thing"'s
        !            15: may well need braces around them to make it
        !            16: clear to neqn which part goes with which.
        !            17: 
        !            18: For example, suppose you want
        !            19: .EQ
        !            20: sum from {pi = 0} to {pi = n}
        !            21: .EN
        !            22: Then you have to ensure that the $pi =0$ and
        !            23: $pi =n$ parts are included in braces or
        !            24: they will not work right.
        !            25: 
        !            26: Modify file "Example" so the output looks like
        !            27: the example above, then type "ready".
        !            28: .pl 1
        !            29: #once #create Ref
        !            30: .LP
        !            31: .EQ
        !            32: sum from {pi = 0} to {pi =n}
        !            33: .EN
        !            34: .pl 1
        !            35: #once #create Example
        !            36: .LP
        !            37: .EQ
        !            38: sum from pi = 0 to pi = n
        !            39: .EN
        !            40: .pl 1
        !            41: #
        !            42: #once neqn Ref | nroff >X1 &
        !            43: #once neqn message Ref | nroff -T$term %s/tinyms -
        !            44: #user
        !            45: neqn Example | nroff >X2
        !            46: #cmp X1 X2
        !            47: #log
        !            48: #next
        !            49: 7.1c 10
        !            50: 7.2b 5

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