I have installed brew on OSX and I have installed successfully several things.
However when I try to install suite-sparse421 (hard constraint on the version):
brew tap homebrew/versions
brew install suite-sparse421
I get the following error:
Error: No available formula with the name "suite-sparse421"
==> Searching for similarly named formulae...
Error: No similarly named formulae found.
==> Searching taps...
Error: No formulae found in taps.
Running brew doctor shows no problem (Your system is ready to brew.)
Running brew update shows no problem (Already up-to-date.)
Any idea?