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Annotation of 43BSD/usr.lib/learn/eqn/L0.1a, revision 1.1.1.1

1.1       root        1: #once #create message
                      2: .EQ
                      3: delim $$
                      4: .EN
                      5: .pl 1
                      6: .ll 55
                      7: This script is designed to teach you the "eqn" language
                      8: for typing mathematics. 
                      9: There are two versions of the program. "eqn" is for
                     10: use on the phototypesetter; "neqn" is for use on a
                     11: terminal like a DASI or GSI, or a Model 37 teletype.
                     12: The lessons are mostly written under the assumption
                     13: that you will be using neqn on a DASI or GSI or teletype;
                     14: a few things that are specific to eqn on the typesetter are
                     15: left to the end.
                     16: 
                     17: The terminal MUST be a DASI or GSI or teletype,
                     18: or you will get some rather startling results
                     19: from this script.
                     20: 
                     21: To verify that everything is working, this message
                     22: should come out with subscripts, superscripts, Greek
                     23: letters and so on.  If it doesn't, we're in
                     24: trouble.
                     25: .sp
                     26: Summation sign: $ sum $
                     27: .sp
                     28: Letter pi: $ pi $
                     29: .sp
                     30: Subscript and superscript: $ x sub i ~=~ y sup j $
                     31: .sp
                     32: If this looks ok, type yes.  Otherwise, type no.
                     33: .pl 1
                     34: #
                     35: #once neqn message | nroff -T$term
                     36: #copyin
                     37: #user
                     38: #uncopyin
                     39: #match yes
                     40: #fail
                     41: Do you have the right kind of terminal?
                     42: If you are using a DASI or GSI, make
                     43: sure the switch labeled "PLOT" inside the cover
                     44: is set to ON.
                     45: If these fail, call for help;
                     46: otherwise type yes the next time.
                     47: #log
                     48: #next
                     49: 1.1a

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