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Carmen
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Are there atomistic ortholattices which are not modular?

It is known that every atomic ortho-modularlattice is also atomistic. Is the converse also true?

If not, can someone give me some examples of atomistic ortholattices which are not modular?

By atomistic I mean that the lattice has atoms and moreover, every element of the lattice can be expressed as a join of atoms.

Carmen
  • 397
  • 4
  • 9