Toeplitz Operators with Frequency Modulated Almost Periodic and Semi-Almost Periodic Symbols. Sergei Grudsky (Mexico, CINVESTAV) Williamsburg,Virginia USA Dedicated to ISRAEL GOHBERG on the occasion of his 80-th birthday. 23 July 2008 Sergei Grudsky (Mexico, CINVESTAV) Williamsburg,Virginia USA Dedicated to ISRAEL GOHBERG on the occasion of his 80-th birt Toeplitz Operators with Frequency Modulated Almost Periodic an