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학술저널

We introduce a new class of σ-coherent frames and show that 1lA is a σ-coherent frame if A is a σ-frame. Based on this, it is shown that a frame is σ-coherent iff it is isomorphic to the frame of σ-ideals of a σ-frame. Finally we show that σCOhFrIIl and σ FrIIl are equivalent.

O. Introduction.

1. σ-frames.

2. ð-frames.

3. ð-coherent frames.

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