h.help

强大的数学工具包

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                               *    help   *
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        If you use the readline-version of simcalc, please use the GNU
        readline commands for line editing.

        DESCRIPTION

        The SIMATH calculator computes the value of expressions over Z,
        Q, R, C, Z/mZ, GF(p^n), number fields, polynomials over Z, Q, 
        Z/mZ, GF(p^n), number fields, R and C, rational functions, 
        matrices and vectors over all these structures.

        Moreover, simcalc contains functions for elliptic curves over 
        Q, Z/pZ (where p is a prime), GF(2^n) or number fields.

        In polynomials, rational functions and matrices and vectors, 
        the variables can be substituted by an arbitrary expression 
        (see "? subst").

        simcalc computes the value of boolean expressions containing 
        the operators ==, !=, <, <=, >, >=, && and ||.

        The loop constructions while, dowhile, for, forstep, forprime 
        and the if-statement make simcalc programmable 
        (see "? progfunc").
        The user of simcalc himself can define functions which may be 
        evaluated in usual syntax (see "? decl").


        USING simcalc

        Predefinitions for simcalc are read out of the file
        .simcalcrc in the current working directory if there exists
        such a file, or in the home directory.
        
        At the simcalc prompt ">" enter your commands in one of the
        following ways:
                "variable = expression"  
        or   
                "expression" 

        In the first case, the value of the expression is assigned to
        the specified variable, and in the second case, it is assigned 
        to the system variable "@". "@"is always assigned the last 
        result that has not been assigned to another variable (see 
        "? sysvar").

        A variable name consists of less than 21 alphanumerical
        characters or can be an array of the form name[index],
        where index is an expression, whose value is a nonnegative
        integer less than 100000.

        All variables (especially the system variable "@") can be used
        in expressions.

        If besides the return value further results are computed by
        a function, these results are stored in the auxiliary array AV.
        The values in AV can be recalled for other computations
        (see "? avfunc").

        In order to suppress the output of the result of an expression, 
        the expression must be terminated by ';'.

        You may enter more than one expression in one single command 
        line separating them by '_' or ';'. If an expression ends with
        '_', its output is displayed, if it ends with ';', its output 
        is suppressed.

        You can interrupt a process by typing "CTRL/C".

        The shell command "com" can be executed during a simcalc session
        by typing "$ com", e.g. "$ ls". 
        By typing "!", you can branch to a subshell.
        By typing "&", the introductary screen of simcalc will appear.

        The command "LINELN = s", where s is a positive single precision 
        number, changes the line length of the output to s characters.
        The default value is LINELN=79.

        Terminate simcalc by "CTRL/D", "exit" or "quit".


        UTILITIES

        Information about functions

                                
         "? func"               lists all functions together with a 
                                short description.

         "? cfunc"              lists all functions for complex numbers
                                together with a short description.

         "? ecfunc"             lists all functions for elliptic curves 
                                and their points together with a short 
                                description.

         "? flfunc"             lists all functions for floating point 
                                numbers together with a short description.
        
         "? gffunc"             lists all functions for Galois-fields
                                together with a short description.

         "? ifunc"              lists all functions for Z together with 
                                a short description.

         "? mfunc"              lists all functions for matrices together 
                                with a short description.

         "? modfunc"            lists all functions for Z/mZ together 
                                with a short description.

         "? nffunc"             lists all functions for number fields 
                                together with a short description.

         "? pfunc"              lists all functions for polynomials 
                                together with a short description.

         "? progfunc"           lists all constructions which make
                                simcalc programmable together with a 
                                short description.

         "? rfunc"              lists all functions for Q together with 
                                a short description.

         "? vfunc"              lists all functions for vectors together 
                                with a short description.

         "? f"                  displays detailed information about the
                                function f.


        Information about variables

         "? var1, ..., varN"    lists the variables var1, ..., varN and 
                                their values.

         "? *xyz*"              lists all variables containing the 
                                pattern "xyz" together with their values.

         "??"                   lists all variables and their values.


        Auxiliary commands

         "? avfunc"             displays information about the
                                auxiliary variable AV.

         "? file"
         "? fload"
         "? fopen"
         "? openf"
         "? fread"
         "? fclose"             displays information on how to read 
                                strings from files.

         "? log"                displays information on how to use the 
                                logging facility.

         "? ow"                 displays information on how to work 
                                with the overwrite protection.

         "? stat"               displays information on how to obtain 
                                statistical messages.

         "? vardel"             displays information on how to delete 
                                variables .

         "? $"                  displays information on how to enter 
                                shell commands and how to branch to a 
                                subshell.