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Functions and commands 329
Zeros With an expression as argument, returns the zeros (real or
complex according to the mode) of the expression. With a list
of expressions as argument, returns the matrix where the rows
are the solutions of the system (i.e. expression1=0,
expression2=0,...,).
zeros(Expr,[Var])
or
zeros([LstExpr],[LStVar])
Example:
zeros(x^2+4) gives [] in real mode and [-2*i,2*i]
in complex mode
Complex Solve Returns a list where the elements are complex solutions of the
system of polynomial equations.
csolve(LstEq,LstVar)
Example:
csolve(x^4-1,x) gives list[1,-1,-i,i]
Complex Zeros With an expression as argument, returns the complex zeros of
the expression. With a list of expressions as argument, returns
the matrix where the rows are the solutions of the system (i.e.
expression1=0, expression2=0,...,).
Czeros(Expr,[Var])
or
Czeros([LstExpr],[LStVar])
Example:
cZeros(x^2-1) gives [1,-1]
Numerical Solve Returns the numerical solution of an equation or a system of
equations.
nSolve(Expr,Var||Var=Guess)
Examples:
nSolve(cos(x)=x,x) gives 0.999847741531
nSolve(cos(x)=x,x=1.3)
gives 0.999847741531