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๐Ÿ“š Mathematics without fluff: Three free books for those who want a solid foundation

Three free mathematics books by Allen Hatcher ๐Ÿงฎ

If you're looking for a solid foundation in topology, K-theory, and number theory, Allen Hatcher has an excellent free collection. ๐ŸŽ“

1. Algebraic Topology ๐Ÿ“
A classic textbook on algebraic topology. The book was published by Cambridge University Press, but the online version is available for free under an agreement with the publisher. The website offers the complete PDF, chapters individually, corrections, and additional exercises.
๐Ÿ”— https://pi.math.cornell.edu/~hatcher/AT/AT.pdf

Additionally: Spectral Sequences - a separate, expanded chapter for this book.
๐Ÿ”— https://pi.math.cornell.edu/~hatcher/AT/ATch5.pdf

2. Vector Bundles & K-Theory ๐Ÿงถ
A concise book about vector bundles, topological K-theory, and characteristic classes. Currently, approximately 120 pages are available online, covering the basics of vector bundles, a portion of K-theory, Bott periodicity, characteristic classes, and the stable J-homomorphism.
๐Ÿ”— https://pi.math.cornell.edu/~hatcher/VBKT/VB.pdf

3. Topology of Numbers ๐Ÿ”ข
An unusual introduction to number theory through geometry and pictures. It focuses heavily on quadratic forms, Farey diagrams, continued fractions, Pell's equation, quadratic reciprocity, and Conway's topograph. A PDF of approximately 350 pages is available for free.
๐Ÿ”— https://pi.math.cornell.edu/~hatcher/TN/TNbook.pdf

#Mathematics #Topology #FreeBooks #Learning #STEM #Education

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Here's a Python tool for accurately extracting text from PDFs and images into Markdown and JSON. ๐Ÿ“„โœจ

It supports tables, formulas, multiple OCR engines (Marker, Surya-OCR, Tesseract) and has built-in personal data removal. ๐Ÿ”’๐Ÿค–

https://github.com/CatchTheTornado/pdf-extract-api

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Free Generative AI Courses

Generative AI Full Course: Gemini Pro, OpenAI, Llama, Langchain, Pinecone, Vector Databases & More
๐Ÿ†“ Free Video Course
โฐ Duration: 30 hrs
๐Ÿƒโ€โ™‚๏ธ Self Paced
๐Ÿ“ˆ Difficulty: Beginner to Intermediate
๐Ÿ‘จโ€๐Ÿซ Instructors: Krish Naik, Sunny Savita & Boktiar Ahmed Bappy via freeCodeCamp
๐Ÿ”— Course Link

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๐Ÿ“ˆ Difficulty: Beginner to Intermediate
๐Ÿ‘จโ€๐Ÿซ Created by: Google & Kaggle
๐Ÿ”— Course Link

Free GenAI 65-Hour Bootcamp
๐Ÿ†“ Free Video Course
โฐ Duration: 65 hrs
๐Ÿƒโ€โ™‚๏ธ Self Paced
๐Ÿ“ˆ Difficulty: Beginner to Intermediate
๐Ÿ‘จโ€๐Ÿซ Instructor: Andrew Brown (ExamPro) via freeCodeCamp
๐Ÿ”— Course Link

Generative AI for Beginners
๐Ÿ†“ Free Video Course
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๐Ÿ“ˆ Difficulty: Beginner
๐Ÿ‘จโ€๐Ÿซ Created by: Great Learning Academy
๐Ÿ”— Course Link

Introduction to Generative AI
๐Ÿ†“ Free Video Course
โฐ Duration: 45 min
๐Ÿƒโ€โ™‚๏ธ Self Paced
๐Ÿ“ˆ Difficulty: Beginner
๐Ÿ‘จโ€๐Ÿซ Created by: Google Skills
๐Ÿ”— Course Link

Generative AI for Beginners
๐Ÿ“š Text Course
โฐ Duration: 21 lessons
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๐Ÿ“ˆ Difficulty: Beginner
๐Ÿ‘จโ€๐Ÿซ Created by: Microsoft Cloud Advocates
๐Ÿ”— Course Link

AI Capabilities and Limitations
๐Ÿ†“ Free Video Course
โฐ Duration: Self-paced
๐Ÿƒโ€โ™‚๏ธ Self Paced
๐Ÿ“ˆ Difficulty: Beginner
๐Ÿ‘จโ€๐Ÿซ Created by: Anthropic Academy
๐Ÿ”— Course Link

Generative AI for Beginners
๐Ÿ†“ Free Video Course
โฐ Duration: 4 hrs
๐Ÿƒโ€โ™‚๏ธ Self Paced
๐Ÿ“ˆ Difficulty: Beginner
๐Ÿ‘จโ€๐Ÿซ Created by: Simplilearn
๐Ÿ”— Course Link



Reading Materials

๐Ÿ“– Prompt Engineering Guide
๐Ÿ“– Awesome Generative AI (Curated Resource List)
๐Ÿ“– Generative AI: A Beginner's Guide
๐Ÿ“– Understanding Generative AI Capabilities
๐Ÿ“–Stanford HAI: 2025 AI Index Report
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Foundations of Applied Mathematics is a free series of four textbooks created for the applied and computational mathematics program at Brigham Young University. ๐Ÿ“š

The series includes four volumes:
*   Mathematical Analysis
*   Algorithms, Approximation, and Optimization
*   Uncertainty and Data
*   Dynamics and Control

The series is suitable for upper-level undergraduate and introductory graduate students. It also includes Python lab exercises and practical assignments, connecting mathematical theory with numerical computation, algorithms, data analysis, and scientific applications. ๐Ÿ

I particularly appreciate that these are not just theoretical textbooks. The accompanying Python materials help to illustrate how these concepts are applied to real-world computational problems. ๐Ÿ’ป

https://foundations-of-applied-mathematics.github.io

#Mathematics #Python #Education #DataScience #Algorithms #Learning

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