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Annotation of 42BSD/usr.lib/learn/eqn/L0.1a, revision 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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