After Example 10.7.1, we examine the case of a class on The Reality of Ducks. Below are listed the students and the books on reserve each seeks. (All titles are of real books.) Can all students work simultaneously?
Amit: Waterfowl Earth Cover Selection Analysis within the National Petroleum Reserve, Alaska; Dabblers & Divers: A Duck Hunter's Book.
Beth: The New Duck Handbook: Ornamental and Domestic Ducks: Everything about Housing, Care, Feeding, Diseases, and Breeding, with a Special Chapter on Commercial Uses of Ducks; Determinants of Breeding Distributions of Ducks; Red Fox Predation on Breeding Ducks in Midcontinent North America.
Carla: Species, Age and Sex Identification of Ducks Using Wing Plumage; Ducks of North America and the Northern Hemisphere.
Dmitri: The Wood Duck and the Mandarin: The Northern Wood Ducks; Ducks of North America and the Northern Hemisphere; Red Fox Predation on Breeding Ducks in Midcontinent North America.
Eglantine: Why Ducks Do That: 40 Distinctive Duck Behaviors Explained & Photographed; Autumn Passages: A Ducks Unlimited Treasury of Waterfowling Classics; Ruddy Ducks & Other Stifftails: Their Behavior and Biology.
Fatima: The New Duck Handbook: Ornamental and Domestic Ducks: Everything about Housing, Care, Feeding, Diseases, and Breeding, with a Special Chapter on Commercial Uses of Ducks; Red Fox Predation on Breeding Ducks in Midcontinent North America.
Gertrude: Cavity Nesting Ducks; Waterfowl Earth Cover Selection Analysis within the National Petroleum Reserve, Alaska; Ruddy Ducks & Other Stifftails: Their Behavior and Biology.
Hiroto: Red Fox Predation on Breeding Ducks in Midcontinent North America; Dabblers & Divers: A Duck Hunter's Book.
Example 10.7.1
A Fish of the World class has eight students who are doing research papers. In the library reserve area, there is a shelf of 12 ichthyology books. Each student has a list of the reserved books that are pertinent to her topic. Can all eight students work in the library at the same time?