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  2. Completeness (order theory) - Wikipedia

    en.wikipedia.org/wiki/Completeness_(order_theory)

    By an argument similar to the above, one finds that the supremum of a set with upper bounds is the infimum of the set of upper bounds. Consequently, bounded completeness is equivalent to the existence of all non-empty infima. A poset is a complete lattice if and only if it is a cpo and a join-semilattice.

  3. Map of lattices - Wikipedia

    en.wikipedia.org/wiki/Map_of_lattices

    An orthocomplemented lattice is complemented. (def) 8. A complemented lattice is bounded. (def) 9. An algebraic lattice is complete. (def) 10. A complete lattice is bounded. 11. A heyting algebra is bounded. (def) 12. A bounded lattice is a lattice. (def) 13. A heyting algebra is residuated. 14. A residuated lattice is a lattice. (def) 15. A ...

  4. L-infinity - Wikipedia

    en.wikipedia.org/wiki/L-infinity

    One application of and is in economics, particularly in the study of economies with infinitely many commodities. [3] In simple economic models, it is common to assume that there is only a finite number of different commodities, e.g. houses, fruits, cars, etc., so every bundle can be represented by a finite vector, and the consumption set is a ...

  5. Lattice (order) - Wikipedia

    en.wikipedia.org/wiki/Lattice_(order)

    A lattice is an abstract structure studied in the mathematical subdisciplines of order theory and abstract algebra.It consists of a partially ordered set in which every pair of elements has a unique supremum (also called a least upper bound or join) and a unique infimum (also called a greatest lower bound or meet).

  6. Complete lattice - Wikipedia

    en.wikipedia.org/wiki/Complete_lattice

    If a complete lattice is freely generated from a given poset used in place of the set of generators considered above, then one speaks of a completion of the poset. The definition of the result of this operation is similar to the above definition of free objects, where "sets" and "functions" are replaced by "posets" and "monotone mappings".

  7. Periodic boundary conditions - Wikipedia

    en.wikipedia.org/wiki/Periodic_boundary_conditions

    Restricting the coordinates is a simple operation which can be described with the following code, where x_size is the length of the box in one direction (assuming an orthogonal unit cell centered on the origin) and x is the position of the particle in the same direction:

  8. Lattice path - Wikipedia

    en.wikipedia.org/wiki/Lattice_Path

    Sets of NE lattice paths squared, with the second copy rotated 90° clockwise. Superimpose the NE lattice paths squared onto the same rectangular array, as seen in the figure below. We see that all NE lattice paths from (,) to (,) are accounted for. In particular, any lattice path passing through the red lattice point (for example) is counted ...

  9. Riesz space - Wikipedia

    en.wikipedia.org/wiki/Riesz_space

    A pre-ordered vector lattice homomorphism between two Riesz spaces is called a vector lattice homomorphism; if it is also bijective, then it is called a vector lattice isomorphism. If u {\displaystyle u} is a non-zero linear functional on a vector lattice X {\displaystyle X} with positive cone C {\displaystyle C} then the following are equivalent: