@johnrockmath
Professor at Cal Poly Pomona, mathematician | Free PDF of Arbitrarily Close: https://www.cpp.edu/faculty/jarock/arbitrarily-close.shtml | Print versions available from 619 Wreath: https://www.619wreath.com/acl.html
It's finally here! "Linear Optimization: A Geometric Inquiry Course" gives an inquiry based course in linear optimization supplemented by technology for intuition building. A great class for interests in either pure or applied math! Physical Copies now on sale: www.619wreath.com/store/p53/Li...
Congratulations!! 🎉
Let's learn about lattice multiplication and why it works
Here's a Desmos for checking to see if your threshold N actually satisfies its role in the definition for a converging sequence in the plane. The default N doesn't work! Can you fix it? www.desmos.com/calculator/z...
I've been learning how to build Desmos activities for real analysis. This one helps build some intuition about the definition of continuity, and in turn it really helps motivate the search for a good threshold delta. www.desmos.com/calculator/e...
I made a mistake! A whole bunch of them, actually. Check them out in the errata for my textbook "Arbitrarily Close: An Introduction to Real Analysis": www.cpp.edu/faculty/jaro.... An updated PDF of the textbook with slightly fewer mistakes free to download.
Cover of the textbook Arbitrarily Close: An Introduction to Real Analysis.
Arbitrarily Close: An Introduction to Real Analysis has been published by 619 Wreath! Free PDF, Desmos, and GeoGebra available on my faculty webpage (at least for the time being): www.cpp.edu/faculty/jaro...
Hardcover and paperback copies are available from 619 Wreath: www.619wreath.com/acl.html
100-45=55. Then add 12 to get 67. I wonder what other people will try?
I want to be romantic about baseball, but it broke my heart tonight instead
Hey remember when the one of the most prominent Democrats in Minnesota and her husband were assassinated
If you do the alternating sum of the digits of a whole number, you can tell if that number is divisible by 11. Here's how and why it works:
Walz: If you say you love freedom but you don't believe freedom is for everybody, then the thing you love is not freedom, it is privilege.
A tweet by Sarah Longwell (@SarahLongwell25 ) reads: "He’s threatening media companies who are critical of him. He’s talking about sending Americans to foreign prisons. He’s signing executive orders to investigate former staff members who spoke out against him. Don’t you see what’s happening here?"
I see it. I have lived it. 83 years ago, the U.S. government turned upon a group of its own citizens and residents and sent them to internment camps without due process. I was there among them. American fascism is back. It is here. It is now.
