## 0.2.1 - 20-Feb-2021
* Added metadata to the gemspec.

## 0.2.0 - 18-Feb-2021
* Switched to Apache-2.0 license.
* Switched from test-unit to rspec.
* Switched from rdoc to markdown.
* Updated Rakefile tasks.
* Updated cert.
* The NOTATION_VERSION constant is now frozen.

## 0.1.2 - 12-Dec-2015
* Added the ∏ (pi product) method.
* This gem is now signed.
* The gem related tasks in the Rakefile now assume Rubygems 2.x.
* Modified the ∑ method to be a one-liner.

## 0.1.1 - 9-Oct-2014
* Updated gem:create and gem:install tasks.
* Updated gemspec to include license, current home page.

## 0.1.0 - 13-Dec-2009
* Initial release