more fix readme

README.md

@@ -38,7 +38,8 @@ its inverse is given by
 Therefore, only the inverse of <a href="https://www.codecogs.com/eqnedit.php?latex=\fn_phv&space;A" target="_blank"><img src="https://latex.codecogs.com/gif.latex?\fn_phv&space;A" title="A" /></a> is required to evaluate the inverse of <a href="https://www.codecogs.com/eqnedit.php?latex=\fn_phv&space;M" target="_blank"><img src="https://latex.codecogs.com/gif.latex?\fn_phv&space;M" title="M" /></a>.
 This package makes available a `HyperDualFactors` type which containts the factors of <a href="https://www.codecogs.com/eqnedit.php?latex=\fn_phv&space;A" target="_blank"><img src="https://latex.codecogs.com/gif.latex?\fn_phv&space;A" title="A" /></a> and the non-real parts of <a href="https://www.codecogs.com/eqnedit.php?latex=\fn_phv&space;M" target="_blank"><img src="https://latex.codecogs.com/gif.latex?\fn_phv&space;M" title="M" /></a>, and overloads `factorize` to create an instance of `HyperDualFactors`, which can then be called with `\` to efficiently solve hyperdual-valued linear systems of the type <a href="https://www.codecogs.com/eqnedit.php?latex=\fn_phv&space;M&space;x&space;=&space;b" target="_blank"><img src="https://latex.codecogs.com/gif.latex?\fn_phv&space;M&space;x&space;=&space;b" title="M x = b" /></a>. 
 
-This package should be useful for evaluation of second derivatives of functions that use `\` (e.g., with iterative solvers).
+This package should be useful for autodifferentiation of functions that use `\`.
+Note that this package is the equivalent of the [DualMatrixTools.jl](https://github.com/briochemc/DualMatrixTools.jl) package, but for hyperdual numbers instead of dual numbers.
 
 ## Usage