Digital library
Textbooks, references and open learning resources.

External
Proofs and Concepts - The Fundamentals of Abstract Mathematics
Dave Witte Morris & Joy Morris · University of Lethbridge
In the contents: 1.01: Assertions deductions and validity · 1.06: Tautologies and contradictions · 1.08: Converse and contrapositive

External
College Algebra
Jay Abramson · Arizona State University
In the contents: 1.6.01: Models and Applications · 1.07: Radicals and Rational Expressions · 1.08: The Rectangular Coordinate Systems and Graphs

External
Math 384: Foundations for Calculus
Roy Simpson · Cosumnes River College
In the contents: 1.01: Functions and Function Notation · 1.1.01: Resources and Key Concepts · 1.02: Domain and Range

External
CLP-1 Differential Calculus
Joel Feldman, Andrew Rechnitzer & Elyse Yeager · University of British Columbia
In the contents: 01: The basics · 2.01: Drawing Tangents and a First Limit · 2.02: Another Limit and Computing Velocity

External
MAT 04C Linear Algebra
Zoya Kravets · Mission College
In the contents: 1.05: Vector Equations and Spans · 2.01: Matrix Arithmetic · 2.06: The Identity and Inverses

External
PreAlgebra
Davis Arnold · College of the Redwoods
In the contents: 1.02: Adding and Subtracting Whole Numbers · 1.03: Multiplication and Division of Whole Numbers · 1.06: Solving Equations by Addition and Subtraction