Cook Carillon Tower on the Pew campus in Grand Rapids, Michigan. Cook Carillon Tower The Cook Carillon Tower is a 10-story-tall carillon-clock tower located in the center of the Grand Valley State University-Allendale campus in Allendale, Michigan. The tower and carillon were built in 1994 with help from generous donations by Peter C. and Pat Cook for which it is named. The tower is considered to be a major icon of both the university and its campus and creates a notable central focal point on the Allendale campus. The 48 carillon bells are cast of bronze by the Royal Eijsbouts Bellfounders and Tower-clock
Partition of a set "coarser" than "α"—if every element of "α" is a subset of some element of "ρ". Informally, this means that "α" is a further fragmentation of "ρ". In that case, it is written that "α" ≤ "ρ". This "finer-than" relation on the set of partitions of "X" is a partial order (so the notation "≤" is appropriate). Each set of elements has a least upper bound and a greatest lower bound, so that it forms a lattice, and more specifically (for partitions of a finite set) it is a geometric lattice. The "partition lattice" of a 4-element set has 15 elements