Log24

Tuesday, September 29, 2015

Quotes for Michaelmas

Filed under: General — Tags: — m759 @ 9:48 pm

A search in this journal for material related to the previous post
on theta characteristics yields

"The Solomon Key  is the working title of an unreleased
novel in progress by American author Dan Brown. 
The Solomon Key  will be the third book involving the
character of the Harvard professor Robert Langdon,
of which the first two were Angels & Demons  (2000) and 
The Da Vinci Code  (2003)." — Wikipedia

"One has O+(6) ≅ S8, the symmetric group of order 8! …."
 — "Siegel Modular Forms and Finite Symplectic Groups,"
by Francesco Dalla Piazza and Bert van Geemen, 
May 5, 2008, preprint.

"It was only in retrospect
that the silliness
became profound."

— Review of   
Faust in Copenhagen

"The page numbers
are generally reliable."

— Michaelmas 2007 

For further backstory, click the above link "May 5, 2008," 
which now leads to all posts tagged on080505

Geometry for Michaelmas

Filed under: General,Geometry — Tags: — m759 @ 1:23 pm

See searches for "theta characteristics" in Google and in this journal.

A definition of particular interest for finite geometry —

Theta characteristics as defined in 'On the Coble Quartic,' Grushevsky and Manni, 2012

The Grushevsky-Manni paper above was submitted to the arXiv
on 9 Dec. 2012. For some synchronistically related remarks
suitable for Michaelmas, see this  journal on that date.

Friday, November 14, 2014

Some Symplectic History

Filed under: General,Geometry — m759 @ 1:28 am

A paper from 1976 on symplectic torsors  and finite geometry:

IMAGE- Saavedra-Rivano, 'Finite Geometries in the Theory of Theta Characteristics' (1976)

A pdf is now available:

FINITE GEOMETRIES IN THE THEORY OF THETA CHARACTERISTICS
Autor(en): Rivano, Neantro Saavedra
Objekttyp: Article
Zeitschrift: L’Enseignement Mathématique
Band (Jahr): 22 (1976)
Heft 1-2: L’ENSEIGNEMENT MATHÉMATIQUE
PDF erstellt am: 14.11.2014
Persistenter Link: http://dx.doi.org/10.5169/seals-48185

(Received by the journal on February 20, 1976.)

Saavedra-Rivano was a student of Grothendieck, who reportedly died yesterday.

Monday, March 10, 2014

God’s Architecture

Filed under: General — m759 @ 1:19 pm

Part I:

The sermon, “God’s Architecture,” at Nassau Presbyterian
Church in Princeton on Sunday, Feb. 23, 2014.  (This is the
“sermon” link in last Sunday’s 11 AM ET Log24 post.)

An excerpt:

“I wonder what God sees when God looks at our church.
Bear with me here because I’d like to do a little architectural
redesign. I look up at our sanctuary ceiling and I see buttons.
In those large round lights, I see buttons. I wonder what would
happen if we unbutton the ceiling, Then I wonder if we were to
unzip the ceiling, pull back the rooftop, and God were to look in
from above – What does God see? What pattern, what design,
what shape takes place?” — Rev. Lauren J. McFeaters

Related material —  All About Eve: 

A. The Adam and Eve sketch from the March 8 “Saturday Night Live”

B. “Katniss, get away from that tree!” —

C. Deconstructing God in last evening’s online New York Times .

Part II:

Heavensbee!” in the above video, as well as Cartier’s Groundhog Day
and Say It With Flowers.

Part III:

Humans’  architecture, as described (for instance) by architecture
theorist Anne Tyng, who reportedly died at 91 on Dec. 27, 2011.
See as well Past Tense and a post from the date of Tyng’s death.

Sunday, March 9, 2014

At Play in the Fields of Brazil

Filed under: General,Geometry — Tags: , — m759 @ 12:00 pm

From Facebook, a photo from the Feast of St. Francis, 2013:

Neantro Saavedra-Rivano, author of the 1976 paper  “Finite
Geometries in the Theory of Theta Characteristics,”  in Brasilia—

On the same date, art from Inception  and from Diamonds Studio
in Brazil —

Sermon

Filed under: General,Geometry — Tags: , — m759 @ 11:00 am

On Theta Characteristics
IMAGE- Saavedra-Rivano, 'Finite Geometries in the Theory of Theta Characteristics' (1976)

— From Zentralblatt-math.org.  8 PM ET update:  See also a related search.

IMAGE- Saavedra-Rivano, Ph.D. U. de Paris 1972, advisor Grothendieck

Some may prefer a more politically correct— and simpler— sermon.

Background for the simpler sermon: Quilt Geometry.

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