The Kim C. Border Repository
Kim Border was a professor in Caltech's Humanities & Social Sciences division for 41 years (1979--2020). He was an amazingly generous teacher with a passion for mathematical economics. As a teacher, he wrote volumes of in-depth lecture notes for his courses and shared them freely on his website. In November 2020 I downloaded as much of this content as I could, so it could be shared with future generations of students and teachers in economics and mathematics.