Uncertainty . . .

     Sometimes we find things of great value when we are looking for something else -- in fact, Argentinian writer Jorge Luis Borges has said, The best way to find a good thing is to go looking for something else . . .
     One of my recent stumbles (while looking for work by Borges) was onto the website of Robert Ronnow -- and I have found it a fun place to browse.  Here is a sample, a poem from his recent collection, The Scientific Way to Do Mathematics:

Uncertainty       by Robert Ronnow

                                                       --with a line by Pico Iyer

There cannot be two identical things in the world. Two
hydrogen atoms
offer infinite locations within their shells for electrons.
Thus, nothing can be definitely eventually known. 

Stars and men revolve in a cycle . . .

In a book-discussion group in which I participate, we are reading some of the short fiction of Jorge Luis Borges (1899-1986) and that reading has provoked me to dive again into my copy of his Selected Poems (Ed. Alexander Coleman, Penguin, 1999).  Here is one of Borges' poems that uses terminology from mathematics:

The Cyclical Night     by Jorge Luis Borges
                                             tr. Alistair Reid (1926-2014)
          to Sylvina Bullrich

 They knew it, the fervent pupils of Pythagoras:
 That stars and men revolve in a cycle,
 That fateful atoms will bring back the vital
 Gold Aphrodite, Thebans, and agoras. 

How many grains of sand?

Recently one of my friends used "all the grains of sand" as an example of an infinite set "because it is impossible to count them all" and -- even as I rejected his answer -- I wondered how many of my other friends might agree with it.  In the following poem, mathematician Pedro Poitevin considers a similar question as he reflects on the countability of the birds in the night sky.

       Divertimentum Ornithologicum      by Pedro Poitevin

                              After Jorge Luis Borges's Argumentum Ornithologicum.

       A synchrony of wings across the sky
       is quavering its feathered beats of flight.
       Their number is too high to count -- I try 

A Man-Made Universe and "found" poems

 Some poems are found rather than crafted.
It's such fun -- can happen to anyone -- 
to be reading along and find a poem. 

     This post continues (from the June 4 posting) consideration of lines that were not initially written as poetry but have been later discovered to have the desirable characteristics of a poem.
     In an early-April posting I offered a poem-in-a-photo, a poem created of book spines -- and the bottom book in my pile of six is Mathematics, the Man-Made Universe:  an Introduction to the Spirit of Mathematics by Sherman K Stein (Third Edition, Freeman, 1976).  Reprinted in 2010 in paperback format, Stein's textbook -- for a "general reader," a curious person who is not a mathematician -- has been on my shelf for many years and, though I never taught from it, I have enjoyed it and shared it with friends (and I love its title). Recently, in the opening paragraph of Stein's Chapter 19 (page 471), I found a poem:

JHM -- many math poems

     Volume 2, Issue 2 (July 2012) of the Journal of Humanistic Mathematics has recently become available online -- and it has lots of poetry.  One valuable resource has been gathered by Charlotte Henderson, a participant in the January 2012 poetry reading at JMM in Boston; Charlotte offers a report on that reading and also has prepared a folder of the poems read there, collected for our ongoing enjoyment.  In this issue also there are poems by Florin Diacu, Ursula Whitcher, and Paige S. Orland and some kind words about this blog by Gregory E. Coxson (JoAnne Growney's Poetry-With-Mathematics Blog -- An Appreciation); many thanks, Greg.
      In the wake of the BRIDGES math-art conference at Towson University last week I also want to mention the lively blog posting about BRIDGES by Justin Lanier at Math Munch. 

I have dreamed geometry

   Descartes     by Jorge Luis Borges

   I am the only man on earth, but perhaps there is neither earth nor man.
   Perhaps a god is deceiving me.
   Perhaps a god has sentenced me to time, that lasting illusion.
   I dream the moon and I dream my eyes perceiving the moon.
   I have dreamed the morning and evening of the first day.