The Treasury late Thursday invited 20 of the largest banks to a meeting to discuss an upcoming quarterly auction of government debt. The discussions will take place at noon at the New York Federal Reserve. Officials representing the bond-trading divisions of banks including JPMorgan, Citigroup, Goldman Sachs and Barclays Capital have been invited to the discussions. Officials said they wanted to meet with all of the big banks involved in the Treasury bond market in light of the concerns confronting the market at the moment with the impasse over approving an increase in the government's $14.3 trillion borrowing limit.