Mathematician
## Mike RaughEmail: auranteacus at gmail com Brief Professional Bio |

In reverse-chronologic order:

2017 (April 13)
*The Leibniz Catenary*, an invited
talk for the
Dartmouth Mathematics Colloquium. In a private letter,
Leibniz explained the analysis he used to arrive at his geometric
construction of the catenary. He wrote: ``Let those who don't know
the new analysis try their luck!'' This talk presents his
elegant construction and analysis. Paradoxically, the construction
isn't possible but it doesn't really matter!

2017 (January 4)
*The Leibniz Catenary Construction: Geometry vs Analysis in the 17th
Century*, an invited talk for the Special Session on the History
of Mathematics at JMM 17 in Atlanta. This talk positions the
publication of Leibniz's construction at the time when mathematicians
were turning away from Descarte's dictate to present curves as
geometric constructs toward analytic presentations. Leibniz played it
both ways: he published a construction that could only have been
derived using calculus but did not disclose the derivation publicly.

2016 (July 6) Talk for RIPS Program at IPAM:
*How did Leibniz Solve the
Catenary Problem? A Mystery Story*.

Turned out not to be a mystery after all!
I learned after this talk, and just before the
talk of January 4, that Leibniz explained his
solution in a private letter to Rudolph Von Bodenhausen of 1691.
This talk, in ignorance of Bodenhausen, features an independent solution that
demonstrates directly how the hyperbolic functions can be easily discovered at the
heart of the catenary problem.
In the most recent talk at Dartmouth (April 13), I explained Leibniz's analysis in detail.
(For a discussion of the Bodenhausen letter, see
*supplementary
notes*.)

2013 The Real Numbers are Not Real:,

Also presented to UNM Math & Stats Club on 3/8/2013. See the related Problematic Four Bugs Problem

2012 For New Mexico Math Contest of Feb 4:

(Repeated at Agilent Technologies Inc in Santa Clara at request of Geront Owen, 8/12/2013)

2012 What was on Top of Archimedes' Tomb?, Mar 2 at 27th Los Angeles City College Math Contest (abreviated version of the New Mexico Math Contest talk)

2010 The Innkeeper's Problem and Tale

2009 Irrationality of

2008 How do you know what time it is?

2007 Hey, who really discovered that theorem!

2006

–

I worked with IPAM staff and the late Robert Borrelli of Harvey Mudd College to create the RIPS program in 2001, and then to continue developing the program over the fifteen summers of my directorship. I enjoyed working with the many students and academic mentors who participated in RIPS over all those years.

My approach to
managing the RIPS program,
was presented to the panel *Starting
and maintaining a student industrial research progam in
the mathematical sciences* at the MAA's MathFest of Aug 4, 2007 in San Jose, CA.

RIPS continued in the summer of 2016 under the directorship of the talented Spanish mathematician and teacher Prof. Susana Serna of the Autonomous University of Barcelona. Prof. Serna had been an academic mentor for RIPS teams for the previous eight summers.

2011 Participated in review panel for the NSF and for the S. -T. Yau High School Mathematics Awards.

(Last modified June 8, 2017)