PNG IHDR tEXtSoftware Wolfram Mathematica 7.0C[ !tEXtCreation Time 2015:01:18 22:45:25< IDATx-x۷}渑\G8PgPTAT@%J T(( b29W̹iO6K^۷o @: ! ! zb`:ίK@?HVϟm