Diestel Graph Theory
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Free online textbook covering trees in depth
More resources on Trees
Art of Problem Solving - Trees
Problem-solving resources and wiki
Tree (graph theory) - Wikipedia
Comprehensive reference with resources
Graph Theory
Learn graph theory focusing on trees with Dr. Sarada Herke! Explore fundamentals and applications in this comprehensive course.
Algorithms, Part I
This course covers the essential information that every serious programmer needs to know about algorithms and data structures, with emphasis on applications and scientific performance analysis of Java implementations. Part I covers elementary data structures, sorting, and searching algorithms. Part II focuses on graph- and string-processing algorithms. All the features of this course are available for free. People who are interested in digging deeper into the content may wish to obtain the textbook Algorithms, Fourth Edition (upon which the course is based) or visit the website algs4.cs.princeton.edu for a wealth of additional material. This course does not offer a certificate upon completion.
Mathematics for Computer Science
Learn about trees in computer science with this course by Tom Leighton & Marten van Dijk. Explore mathematical foundations!
mathworld.wolfram.com
MathWorld is a comprehensive online mathematics encyclopedia from Wolfram Research that offers detailed articles, formulas, diagrams, and references across math topics. It provides extensive coverage of graph theory and tree structures, making it a solid resource for understanding trees and related concepts.