This page introduces combinatorics, focusing on counting and key terms like "alphabet," "string," and "permutation." It defines "string" as an ordered set of characters and explains "permutation" as a...This page introduces combinatorics, focusing on counting and key terms like "alphabet," "string," and "permutation." It defines "string" as an ordered set of characters and explains "permutation" as any arrangement of those characters. The text provides examples and includes practice checkpoints for generating strings and permutations of varying lengths and characters.
This page discusses lexicographic ordering, which arranges strings alphabetically. It includes exercises using the string "mat" to list permutations in this order, determines the total permutations fo...This page discusses lexicographic ordering, which arranges strings alphabetically. It includes exercises using the string "mat" to list permutations in this order, determines the total permutations for "mat" and "math," and analyzes how the number of arrangements increases with string length.