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Annotation of 42BSD/usr.lib/learn/eqn/L5.1a, revision 1.1.1.1

1.1       root        1: #once #create message
                      2: .ND
                      3: .EQ
                      4: delim $$
                      5: .EN
                      6: .LP
                      7: So far we have carefuly skirted around a potential
                      8: problem; maybe you've wondered about it.
                      9: Suppose we want to produce an equation that looks
                     10: like this:
                     11: .EQ
                     12: x sup { pi + 1 }
                     13: .EN
                     14: The superscript is complicated, in that it contains
                     15: both a $pi$ and a +1, which has to be separated
                     16: from the $pi$ by a blank.
                     17: But I already told you that a blank terminates
                     18: the superscript.  What's going on?
                     19: 
                     20: As the first step to finding out, will the input
                     21: equation
                     22: 
                     23:   x sup pi + 1
                     24: 
                     25: produce the output
                     26: 
                     27:   $x sup {pi + 1}$ ?
                     28: Answer yes or no.
                     29: (You can play with the file "Example" if you like.)
                     30: .pl 1
                     31: #once #create Example
                     32: .LP
                     33: .EQ
                     34: replace me
                     35: .EN
                     36: .pl 1
                     37: #
                     38: #once neqn message | nroff -T$term %s/tinyms -
                     39: #copyin
                     40: #user
                     41: #uncopyin
                     42: #match no
                     43: #log
                     44: #next
                     45: 5.1b

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