| 21. | Since any Boolean algebra is a distributive lattice, this shows the desired implication.
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| 22. | Monadic Boolean algebras also have an important connection to modal logic.
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| 23. | The power set of a set, together with the operations of Boolean algebra.
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| 24. | In fact, any skew Boolean algebra can be embedded into such an algebra.
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| 25. | Cardinal functions are often used in the study of Boolean algebras.
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| 26. | She specializes in set theory, topology, Boolean algebra, and mathematics education.
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| 27. | The underlying poset of a Boolean algebra always forms a lattice.
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| 28. | It is mathematically possible to derive boolean algebras which have more than two states.
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| 29. | The collection of all projection bands in a Riesz space forms a Boolean algebra.
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| 30. | Later Carath�odory extended the theory from sets to Boolean algebras.
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