A formula. The right side names the variable with respect to which the zeros should be found. The left side is an expression, e.g. sin(x) ~ x. All variables named in the expression must be assigned values via ...
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Specific numerical values for the unbound variables in the expression.
xlim
The range of the dependent variable to search for zeros. Inf is a legitimate value, but is interpretted in the numerical sense.
npts
How many sub-intervals to divide the xlim into when looking for candidates for zeros. If Inf is involved, the intervals are numerically spaced up to the largest finite floating point number.
Value
A set of zero or more numerical values. Plugging these into the expression on the left side of the formula should result in values near zero.