Subject

Re: needed: a mathematician (fwd) Euler (fwd)

From

Date

Body

------------------ Carolyn:

Maybe I can help, though I don't have access to Ada or my books here at

work.

There are a number of "Euler Problems." The problem usually given this name

concerns the movement of a point under attraction by two gravitational

centers, though I might be betraying my mechanics background.

Since Ada is not a work of mathematics, my guess is that this problem isn't

what Van has solved, but some variation on the Konigsberg Bridge Problem.

Euler showed that this was unsolvable, but there are many similar problems,

some of which are seen in puzzle books now and then.

Here is a link:

http://mathworld.wolfram.com/KoenigsbergBridgeProblem.html

The Euler constant is the number (limit) towards which the following

sequence tends as n becomes very large:

1 + 1/2 + 1/3 + 1/4 ... + 1/n - log n . It is approximately 0.577, and no

one knows yet if it is "rational", ie expressible as the ratio of two whole

numbers, like 1/2 or 16777/47474798.

This number is important in number theory, particularly as used to express

the "gamma function." A reasonable explanation:

http://primes.utm.edu/glossary/page.php?sort=Gamma

As to "Euler Triplets" and super-symmetry, well, this is fairly rarified air

even for mathematicians. The mathematical physicist John Baez has mentioned

them in his posts "This Week in Physics". He works in quantum gravity and

other places where supersymmetry abounds.

You can find an archive here:

http://math.ucr.edu/home/baez/README.html

He's a very friendly sort, you might try emailing him, if you think there is

really a connection with Ada. Though this is fairly doubtful.

Robert.

------------------------------

Robert Weldon

CMLabs Simulations Inc.

420 Notre Dame St. West, Suite 505

Montreal, Qc H2Y 1V3 CANADA

Tel: +1.(514)-287-1166

Fax: +1.(514)-287-3360

http://www.cm-labs.com

robert.weldon@cm-labs.com

-----Original Message-----

From: Vladimir Nabokov Forum [mailto:NABOKV-L@LISTSERV.UCSB.EDU]On

Behalf Of Donald B. Johnson

Sent: Wednesday, October 29, 2003 2:25 PM

To: NABOKV-L@LISTSERV.UCSB.EDU

Subject: needed: a mathematician (fwd) Euler

---------- Forwarded Message ----------

Date: Wednesday, October 29, 2003 8:53 AM -0800

From: Carolyn Kunin <chaiselongue@earthlink.net>

To: Vladimir Nabokov Forum <NABOKV-L@listserv.ucsb.edu>

Subject: needed: a mathematician

To the list,

I am an ignoramus when it comes to maths. But I had noted some mathematical

references in Ada. At one point Van solves an "Euler problem" referring to

the mathematician Leonhard Euler, Catherine the Great's mathematician who

accompanied several Bernoullis from Basel to Petersburg.

Last night I saw part of a program devoted to string theory and the Euler

constant came up. A little googling lead to the discovery of something

called "Euler triplets in supersymmetry." This is all totally beyond my

comprehension.

Is there a mathematician in the house?

Carolyn

---------- End Forwarded Message ----------

D. Barton Johnson

NABOKV-L

---------- End Forwarded Message ----------

D. Barton Johnson

NABOKV-L

Maybe I can help, though I don't have access to Ada or my books here at

work.

There are a number of "Euler Problems." The problem usually given this name

concerns the movement of a point under attraction by two gravitational

centers, though I might be betraying my mechanics background.

Since Ada is not a work of mathematics, my guess is that this problem isn't

what Van has solved, but some variation on the Konigsberg Bridge Problem.

Euler showed that this was unsolvable, but there are many similar problems,

some of which are seen in puzzle books now and then.

Here is a link:

http://mathworld.wolfram.com/KoenigsbergBridgeProblem.html

The Euler constant is the number (limit) towards which the following

sequence tends as n becomes very large:

1 + 1/2 + 1/3 + 1/4 ... + 1/n - log n . It is approximately 0.577, and no

one knows yet if it is "rational", ie expressible as the ratio of two whole

numbers, like 1/2 or 16777/47474798.

This number is important in number theory, particularly as used to express

the "gamma function." A reasonable explanation:

http://primes.utm.edu/glossary/page.php?sort=Gamma

As to "Euler Triplets" and super-symmetry, well, this is fairly rarified air

even for mathematicians. The mathematical physicist John Baez has mentioned

them in his posts "This Week in Physics". He works in quantum gravity and

other places where supersymmetry abounds.

You can find an archive here:

http://math.ucr.edu/home/baez/README.html

He's a very friendly sort, you might try emailing him, if you think there is

really a connection with Ada. Though this is fairly doubtful.

Robert.

------------------------------

Robert Weldon

CMLabs Simulations Inc.

420 Notre Dame St. West, Suite 505

Montreal, Qc H2Y 1V3 CANADA

Tel: +1.(514)-287-1166

Fax: +1.(514)-287-3360

http://www.cm-labs.com

robert.weldon@cm-labs.com

-----Original Message-----

From: Vladimir Nabokov Forum [mailto:NABOKV-L@LISTSERV.UCSB.EDU]On

Behalf Of Donald B. Johnson

Sent: Wednesday, October 29, 2003 2:25 PM

To: NABOKV-L@LISTSERV.UCSB.EDU

Subject: needed: a mathematician (fwd) Euler

---------- Forwarded Message ----------

Date: Wednesday, October 29, 2003 8:53 AM -0800

From: Carolyn Kunin <chaiselongue@earthlink.net>

To: Vladimir Nabokov Forum <NABOKV-L@listserv.ucsb.edu>

Subject: needed: a mathematician

To the list,

I am an ignoramus when it comes to maths. But I had noted some mathematical

references in Ada. At one point Van solves an "Euler problem" referring to

the mathematician Leonhard Euler, Catherine the Great's mathematician who

accompanied several Bernoullis from Basel to Petersburg.

Last night I saw part of a program devoted to string theory and the Euler

constant came up. A little googling lead to the discovery of something

called "Euler triplets in supersymmetry." This is all totally beyond my

comprehension.

Is there a mathematician in the house?

Carolyn

---------- End Forwarded Message ----------

D. Barton Johnson

NABOKV-L

---------- End Forwarded Message ----------

D. Barton Johnson

NABOKV-L