require 'veritas/algebra/difference'
require 'veritas/algebra/extension'
require 'veritas/algebra/intersection'
require 'veritas/algebra/join'
require 'veritas/algebra/product'
require 'veritas/algebra/projection'
require 'veritas/algebra/rename'
require 'veritas/algebra/restriction'
require 'veritas/algebra/summarization'
require 'veritas/algebra/union'