Courses from 1000+ universities
17 years ago, Krishna Kumar started offering free PMP prep online. Today, it’s a leading digital upskilling platform that helps millions upskill in AI, cybersecurity, data science, and more.
600 Free Google Certifications
Language Learning
Data Analysis
Microsoft Excel
Introductory Human Physiology
Critical Thinking at University: An Introduction
The Emergence of the Modern Middle East - Part I
Organize and share your learning with Class Central Lists.
View our Lists Showcase
Explore a wide range of free and certified Graph theory online courses. Find the best Graph theory training programs and enhance your skills today!
Learn graph database concepts, Neo4j, and Cypher query language. Explore relationships, constraints, functions, and algorithms for efficient data management and analysis.
Explore number theory concepts through engaging proofs, puzzles, and problems, from classic irrationality demonstrations to modular arithmetic and prime numbers.
Explore color theory fundamentals using oil pastels, covering the color wheel, mixing, value, intensity, and harmonies for a solid foundation in artistic color application.
Explore color theory and mixing techniques with artists Matt Fussell and Ashley Hurst. Learn to create a color wheel, understand color relationships, and mix any desired color using warm and cool primaries.
Explore Graph Neural Networks for ETA prediction in Google Maps, covering graph formation, features, GNN architecture, loss functions, baselines, inference, and experimental results.
Explore key concepts in learning theory and behaviorism, including classical and operant conditioning, observational learning, and cognitive processes in psychology.
Explore Boolean algebra, set theory, and Venn diagrams. Learn about De Morgan's laws, distributive properties, and their proofs using truth tables and Boole's algebra.
Explores logical issues with the modern theory of limits in mathematics, examining the formal definition and its problems through examples and historical context.
Explore Constraint Satisfaction Problems, their formal definition, examples, and algorithms. Learn about the Dichotomy Theorem and its implications for theoretical computer science research.
Explore Reddit's implementation of a graph-based CMDB for cloud security governance, including visibility gains, implementation journey, and the power of centralized configuration data aggregation.
Explore learning theory applications in computational microscopy, focusing on advanced techniques for image analysis and reconstruction in scientific research.
Explore Greibach Normal Form and learn how to convert context-free grammars to GNF. Gain insights into this important concept in automata theory and formal language processing.
Learn to convert finite automata to regular expressions using Arden's method in automata theory. Explore step-by-step process with examples to master this important concept in theoretical computer science.
Learn to convert NFA with epsilon transitions to NFA without epsilon, a crucial skill in automata theory. Understand the step-by-step process and its importance in simplifying finite automata representations.
Explore electronic structure theory through classical and quantum computation, focusing on innovative techniques for modeling molecular systems and their potential applications.
Get personalized course recommendations, track subjects and courses with reminders, and more.