This way of multiplying is isomorphic to what I learned in third grade. Multiply these numbers as you were taught. If your numbers have n and m digits, below the line in the multiplication there will be n m-digit numbers. (Ignoring carries for the sake of exposition), each of those n by m digits corresponds to a count of one of the small grids in the Japanese method. Hence the isomorphism.
Carries seem to b handled the same way in both methods. — Barry On Nov 3, 2018, 8:23 PM -0400, Frank Wimberly <[email protected]>, wrote: > "Real" and "real math" are two different things. My definition of real math > is exposition of the form "definition, theorem, proof". When you figure out > what "real" means, let me know. > > Frank > > ----------------------------------- > Frank Wimberly > > My memoir: > https://www.amazon.com/author/frankwimberly > > My scientific publications: > https://www.researchgate.net/profile/Frank_Wimberly2 > > Phone (505) 670-9918 > > > On Sat, Nov 3, 2018, 6:14 PM Nick Thompson <[email protected] > > wrote: > > > What!???? How could any mathematics not be REAL! FRANK! Defend yourself! > > > > > > NIck > > > > > > Nicholas S. Thompson > > > Emeritus Professor of Psychology and Biology > > > Clark University > > > http://home.earthlink.net/~nickthompson/naturaldesigns/ > > > > > > From: Friam [mailto:[email protected]] On Behalf Of Prof David > > > West > > > Sent: Saturday, November 03, 2018 5:52 PM > > > To: [email protected] > > > Subject: Re: [FRIAM] This is how the Japanese multiply. (Math, not > > > biology) > > > > > > I have a couple of books on "Vedic Math" - a large set of techniques for > > > how to calculate. This technique was among them. Showed the books to > > > Frank once, he was not impressed, "not real mathematics." > > > > > > davew > > > > > > > > > > > > On Sat, Nov 3, 2018, at 9:02 AM, Tom Johnson wrote: > > > > https://www.facebook.com/637328420/posts/10156877698343421/ > > > > ============================================================ > > > > FRIAM Applied Complexity Group listserv > > > > Meets Fridays 9a-11:30 at cafe at St. John's College > > > > to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com > > > > FRIAM-COMIC http://friam-comic.blogspot.com/ by Dr. Strangelove > > > > > > ============================================================ > > > FRIAM Applied Complexity Group listserv > > > Meets Fridays 9a-11:30 at cafe at St. John's College > > > to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com > > > FRIAM-COMIC http://friam-comic.blogspot.com/ by Dr. Strangelove > ============================================================ > FRIAM Applied Complexity Group listserv > Meets Fridays 9a-11:30 at cafe at St. John's College > to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com > FRIAM-COMIC http://friam-comic.blogspot.com/ by Dr. Strangelove
============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com FRIAM-COMIC http://friam-comic.blogspot.com/ by Dr. Strangelove
