WebMar 24, 2024 · Every finite totally ordered set is well ordered. The set of integers , which has no least element, is an example of a set that is not well ordered. An ordinal number is the order type of a well ordered set. See also Axiom of Choice, Hilbert's Problems, Initial Segment, Monomial Order, Ordinal Number, Order Type, Subset, Well Ordering Principle WebMar 24, 2024 · Let be a finite partially ordered set. A chain in is a set of pairwise comparable elements (i.e., a totally ordered subset). The partial order length of is the maximum cardinal number of a chain in . For a partial order, the size of the longest chain is called the partial order length . See also
7.4: Partial and Total Ordering - Mathematics LibreTexts
WebMar 25, 2024 · set theory, branch of mathematics that deals with the properties of well-defined collections of objects, which may or may not be of a mathematical nature, such as numbers or functions. The theory is less valuable in direct application to ordinary experience than as a basis for precise and adaptable terminology for the definition of complex and … WebMar 24, 2024 · Foundations of Mathematics Set Theory Partial Orders Partial Order A relation " " is a partial order on a set if it has: 1. Reflexivity: for all . 2. Antisymmetry: and implies . 3. Transitivity: and implies . For a partial order, the size of the longest chain ( antichain) is called the partial order length ( partial order width ). dick smith fyshwick
Order Type -- from Wolfram MathWorld
WebApr 2, 2015 · I'm pretty sure the distinction between List and Set exists in computer science because people wanted a term to describe a sequence of data (a "List") versus an unordered, unsequenced "Set", and because many lists are implemented in a way such that they are logically described as a List. WebOrder topology. In mathematics, an order topology is a certain topology that can be defined on any totally ordered set. It is a natural generalization of the topology of the real numbers to arbitrary totally ordered sets. If X is a totally ordered set, the order topology on X is generated by the subbase of "open rays". WebFeb 6, 2024 · Order (on a set) order relation A binary relation on some set $A$, usually denoted by the symbol $\leq$ and having the following properties: 1) $a\leq a$ … dick smith ge6602