This is how the Japanese multiply. (Math, not biology)
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This is how the Japanese multiply. (Math, not biology)
 
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============================================================ 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 |
Re: This is how the Japanese multiply. (Math, not biology)
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Cool, I'll have to look into that in my spare time. Looks a lot more "paper space" efficient and less error prone than what most of us grew up with. On Sat, Nov 3, 2018 at 10:03 AM Tom Johnson <[hidden email]> wrote: ============================================================ ============================================================ 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 |
Re: This is how the Japanese multiply. (Math, not biology)
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paper efficient when digits are less than 3. Work out 898 * 879 with lines and compare to traditional method. _______________________________________________________________________ [hidden email] CEO, Simtable http://www.simtable.com 1600 Lena St #D1, Santa Fe, NM 87505 office: (505)995-0206 mobile: (505)577-5828 twitter: @simtable On Sat, Nov 3, 2018 at 12:09 PM Gary Schiltz <[hidden email]> wrote:
============================================================ 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 |
Re: This is how the Japanese multiply. (Math, not biology)
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In reply to this post by Tom Johnson
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:
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Re: This is how the Japanese multiply. (Math, not biology)
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How arrogant of me! ----------------------------------- 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, 5:52 PM Prof David West <[hidden email] wrote:
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Re: This is how the Japanese multiply. (Math, not biology)
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In reply to this post by Prof David West
What!???? How could any mathematics not be REAL! FRANK! Defend yourself! NIck Nicholas S. Thompson Emeritus Professor of Psychology and Biology Clark University From: Friam [mailto:[hidden email]] On Behalf Of Prof David West 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:
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Re: This is how the Japanese multiply. (Math, not biology)
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"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 <[hidden email] wrote:
============================================================ 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 |
Re: This is how the Japanese multiply. (Math, not biology)
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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 <[hidden email]>, wrote:
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Re: This is how the Japanese multiply. (Math, not biology)
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In reply to this post by Frank Wimberly-2
Yeah. I am not on my “Real” kick today. “real” is good enough for me. “real” in the sense of honorable, respectable, normative, proper, honest, genuine, true to itself, etc. But on your definition, applied math wouldn’t be “real”, right? CS wouldn’t be real math, either. To me, math is “just” the development or use of formal systems to advance knowledge. On that understanding, the use of any kind of formal system to model a natural system is “real math.” I take it you would disagree. Nick Nicholas S. Thompson Emeritus Professor of Psychology and Biology Clark University http://home.earthlink.net/~nickthompson/naturaldesigns/ From: Friam [mailto:[hidden email]] On Behalf Of Frank Wimberly "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 ----------------------------------- On Sat, Nov 3, 2018, 6:14 PM Nick Thompson <[hidden email] wrote:
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Re: This is how the Japanese multiply. (Math, not biology)
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Some applied math is real math by my definition as is some CS. Jon, Hywel and I were reading Schutz on general relativity. It was close to being "real math" but I was quite frustrated. He talks a good deal about the metric tensor but never really defines it. As far as I can see it's neither a metric nor a tensor according to the definitions I learned in math classes. Frank ----------------------------------- Frank Wimberly My memoir: https://www.amazon.com/author/frankwimbely My scientific publications: https://www.researchgate.net/profile/Frank_Wimberly2 Phone (505) 670-9918 On Sat, Nov 3, 2018, 10:06 PM Nick Thompson <[hidden email] wrote:
============================================================ 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 |
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