TY - JOUR ID - TI - Range equality of two operators on Hilbert space AU - sadiq Naii Nassir AU - NIIohamined Saleh Balasin PY - 2010 VL - IS - 6 SP - 31 EP - 42 JO - Journal of College of Education مجلة كلية التربية SN - 18130380 AB -

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