Robert Ghrist has written an colorful and innovative calculus text. https://www.math.upenn.edu/~ghrist/calculus.html https://www.math.upenn.edu/~ghrist/calculu

Robert Ghrist has written an colorful and innovative calculus text. https://www.math.upenn.edu/~ghrist/calculus.html https://www.math.upenn.edu/~ghrist/calculus.html https://www.math.upenn.edu/~ghrist/notes.html https://www.math.upenn.edu/~ghrist/notes.html https://sites.math.washington.edu/~morrow/334_13/FLCT.pdf https://sites.math.washington.edu/~morrow/334_13/FLCT.pdf