I've been grading calculus exams this week, and even though my students did quite well overall there were a couple of errors that I see every semester. Errors that make mathematicians' heads explode.

' Immersive Math ' is a free textbook site that makes linear algebra, a field of mathematics that studies calculations such as vectors and matrices, easier to understand by providing interactive ...

Let A be a function algebra on a locally compact Hausdorff space. A linear isometry T: A → A is said to be of codimension 1 if the range of T has codimension 1 in A. In this paper, we provide and ...