(Not OP)
It was http://sites.stat.psu.edu/~babu/nash/money.pdf, http://lesswrong.com/r/discussion/lw/ogp/a_proposal_for_a_simpler_solution_to_all_these/, and http://lesswrong.com/lw/ogt/do_we_share_a_definition_for_the_word_ideal/.
(Not OP)
It was http://sites.stat.psu.edu/~babu/nash/money.pdf, http://lesswrong.com/r/discussion/lw/ogp/a_proposal_for_a_simpler_solution_to_all_these/, and http://lesswrong.com/lw/ogt/do_we_share_a_definition_for_the_word_ideal/.