History of Mathematics
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By David Bressoud @dbressoud As of 2024, new Launchings columns appear on the third Tuesday of the month./ And now something else remarkable happens. If our function is differentiable at every point inside an open disc that contains x, no matter how small that disc might be, then the second derivative must exist everywhere inside that...
By Shriya V. Nagpal I had just finished introducing sequences, and the students were working on a practice problem before I presented it on the board. As I did most days, I walked around the classroom, checking in on their understanding. The students were distracted — registration for next semester had opened that morning for...