Assigning an integer value to digits will change the precision to the given
number of decimal places.
.SS WILDCARDS
-The has(), match() and subs() functions accept wildcards as placeholders for
-expressions. These have the syntax
+The has(), find(), match() and subs() functions accept wildcards as placeholders
+for expressions. These have the syntax
.RS
.BI $ number
.RE
.SS LAST PRINTED EXPRESSIONS
ginsh provides the three special symbols
.RS
-", "" and """
+%, %% and %%%
.RE
that refer to the last, second last, and third last printed expression, respectively.
These are handy if you want to use the results of previous computations in a new
.BI content( expression ", " symbol )
\- content part of a polynomial
.br
+.BI decomp_rational( expression ", " symbol )
+\- decompose rational function into polynomial and proper rational function
+.br
.BI degree( expression ", " object )
\- degree of a polynomial
.br
.BI expand( expression )
\- expands an expression
.br
+.BI find( expression ", " pattern )
+\- returns a list of all occurrences of a pattern in an expression
+.br
.BI gcd( expression ", " expression )
\- greatest common divisor
.br
-.BI has( expression ", " expression )
-\- returns "1" if the first expression contains the second (which may contain wildcards) as a subexpression, "0" otherwise
+.BI has( expression ", " pattern )
+\- returns "1" if the first expression contains the pattern as a subexpression, "0" otherwise
.br
.BI inverse( matrix )
\- inverse of a matrix
.BI lsolve( equation-list ", " symbol-list )
\- solve system of linear equations
.br
+.BI map( expression ", " pattern )
+\- apply function to each operand; the function to be applied is specified as a pattern with the "$0" wildcard standing for the operands
+.br
.BI match( expression ", " pattern )
\- check whether expression matches a pattern; returns a list of wildcard substitutions or "FAIL" if there is no match
.br
[[\-x+x^2\-2,(x+1)^2],[c,d]]
> determinant(M);
\-2*d\-2*x*c\-x^2*c\-x*d+x^2*d\-c
-> collect(", x);
+> collect(%, x);
(\-d\-2*c)*x+(d\-c)*x^2\-2*d\-c
> solve quantum field theory;
parse error at quantum