understandingmath at Yahoo! Groups

table proofs

Walter Vannini — Mon, 06 Aug 2007 19:58:46 GMT

I'm always on the lookout for ways of visualizing mathematical results. In this essay I'm going to restrict myself to pictures. Furthermore, I'm going to

There are infinitely many primes

Walter Vannini — Mon, 23 Jul 2007 18:45:32 GMT

For quite a while, I knew of only one proof of the "infinitude of primes", namely Euclid's proof. Over the years, I've come across others, and I've noticed

Fibonacci numbers completed

Walter Vannini — Wed, 11 Jul 2007 20:16:12 GMT

The Fibonacci essay I mentioned a few days ago is done. There's now roughly twice the content than there was in the original incomplete version. As before,

Fibonacci numbers revisited

Walter Vannini — Sat, 07 Jul 2007 22:55:48 GMT

Properties of Fibonacci numbers are often proved by induction. Although this results in technically correct proofs, I find that proofs by induction usually

Googleplex?

Walter Vannini — Tue, 25 May 2004 07:51:47 GMT

... Welcome! ... Yes. ... They're kind of the same: they all involve one followed by some number of zeros. But, the NUMBER of zeros is QUITE different. Here's

[umath] Googleplex?

Corey — Tue, 25 May 2004 04:23:34 GMT

Hello, I'm new to the group. I'm trying to get my brain wrapped around the concept of a Googleplex. I *think* * understand a Google. It's one followed by 100

Googleplex?

skyblueredbirdgreenhouse — Tue, 25 May 2004 02:27:49 GMT

Hello, I'm new to the group. I'm trying to get my brain wrapped around the concept of a Googleplex. I *think* * understand a Google. It's one followed by 100

Re: [umath] The SS Code?

Walter Vannini — Thu, 08 Jan 2004 22:48:34 GMT

... Hard to say. The arithmetic follows from known algebraic identities. That part of your findings isn't new. As for the historical/biblical connections, I

The SS Code?

numberland2001 — Thu, 08 Jan 2004 08:33:26 GMT

I was wondering. Yes, I was wondering this morning about some basic arithmetic, I have pompously titled, the S.S. Code, (the reason for such could be given in

Re: [umath] Three times Five equals Fifteen revisited

Wayne Vucenic — Fri, 02 Jan 2004 06:46:52 GMT

Hi Walter, Wow! Great stuff on 3*5=15. You clearly put a lot of work into this. I read your page on Mantis. It sounds good, and I'll be sure to give it a

Three times Five equals Fifteen revisited

Walter Vannini — Thu, 01 Jan 2004 21:46:48 GMT

The identity 3*5=15 quickly leads to more mathematics: various algebraic identities, an infinite product, Fibonacci numbers, the Golden Ratio, Mersenne primes,

Large Numbers

Walter Vannini — Tue, 16 Dec 2003 00:36:15 GMT

I've posted a new essay on "Large Numbers". It's at . "This is about some ways I've come up with to get a gut

Solving the cubic

Walter Vannini — Fri, 05 Dec 2003 02:45:45 GMT

I've posted a new essay on "Solving The Cubic". It's at Hope you enjoy it, Walter P.S. I know that some of the

Absolute Value...

Corey Bray — Sun, 07 Sep 2003 17:31:18 GMT

My book claims that, ... So, this just means that |x| breaks into two equations, x => 0 -x < 0 But, I am not clear how my book jumps from this to saying that x

Re: [umath] Symmetric Difference...

Walter Vannini — Wed, 03 Sep 2003 21:22:29 GMT

Hi Corey, ... This is where spelling things out really becomes useful. Your approach may work, depending on a whole lot of context which I haven't seen, but