An * ordered tree* (or * plane tree* ) is a rooted tree in which an ordering is specified for the children of each vertex. This is called a "plane tree" because an ordering of the children is equivalent to an embedding of the tree in the plane, with the root at the top and the children of each vertex lower than that vertex. Given an embedding of a rooted tree in the plane, if one fixes a direction of children, say left to right, then an embedding gives an ordering of the children. Conversely, given an ordered tree, and conventionally drawing the root at the top, then the child vertices in an ordered tree can be drawn left-to-right, yielding an essentially unique planar embedding .

Introduction to Preprofessional Studies
Lab (PCB 3083L) 1 credit

Prerequisite: Permission of instructor;
Corequisite: PCB 3083

Shadowing of physicians in hospital and office settings, including visits to
local facilities and observations of actual medical procedures. Grading: Pass/fail
option.

Mathematical
Sciences

Courses offered by the Department of Mathematical Sciences may require the
use of a calculator or computer software. Mathematics majors may not count
mathematics courses taken as "pass/fail" as part of their program. Prerequisite
courses must be completed with grades of "C" or better.