Prosecutors on Monday filed formal requests for execution warrants against two death row inmates, after previously announcing that they would do so . Clark County District Attorney Steve Wolfson said last month that his office would seek the warrants for Zane Floyd, 50, Donald Sherman, 62, and Sterling Atkins, 52. All three are convicted murderers incarcerated at High Desert State Prison and have spent decades behind bars. In Floyd’s case, prosecutors want District Judge Jacqueline Bluth to sign off on an order of execution, then issue a warrant of execution on Aug. 25. The week of Sept. 14 “is being proposed as a date for the Director of the Department of Corrections to execute the judgment,” they wrote. Authorities have the same week in mind for Sherman, according to court records. They are asking District Judge Tierra Jones to issue his execution warrant “on or about” Aug. 27. As of Tuesday morning, no formal request had been filed in Atkins’ case. Of the three, Floyd is the most notorious.…