IRIS login | Reed College home Volume 94, No. 4: December 2015

Prof. **Angelica Osorno** [math 2013-] has won a Collaboration Grant for Mathematicians in the amount of $35,000 from the Simons Foundation to study infinite loop spaces.

An infinite loop space is a topological space that has a multiplication that is associative, commutative, and unital up to all higher homotopies. Infinite loop spaces are closely related to generalized cohomology theories, and are thus of great importance in algebraic topology.

Prof. Osorno is the principal coordinator on the project, “Categorical inputs for infinite loop machine spaces,” which centers on two aspects of infinite loop space theory: infinite loop space machines for 2-categories and equivariant infinite loop space machines.

Continue reading Math Prof Wins Grant to Study Infinite Loop Spaces

An ascending 1-stair packing polynomial, which assigns an integer to each co-ordinate in the sector of the plane that has been cordoned off by the hobgoblin's velvet cord (in this example, the hobgoblin chose the sector bounded by a line with slope 8/5).

Imagine dashing into a vast, Borgesian concert hall just before the curtain rises. There’s an infinite number of guests and an infinite number of seats, neatly arranged in rows and columns. Unfortunately, a mischievous hobgoblin has roped off a section of the auditorium with a velvet cord, putting some seats out of commission. How do you, Guest N, figure out where to sit?

Okay, it’s a far-fetched scenario, but math major **Maddie Brandt ’15** is the first person in history to solve it in her paper “Quadratic Packing Polynomials On Sectors Of R^{2},” which she will present at a national conference in January.

The problem of assigning guests to seats is directly related to the problem of mapping the non-negative integers (those friendly, deceptively familiar objects such as 0,1,2,3, and their ilk) onto the co-ordinate plane (defined by pairs of integers such (0,0), (0,1), (0,2), etc.—think of the game of battleships). How do you map the integers to the co-ordinate pairs in such a way that you count all the pairs one after another, without skipping any?

Continue reading How to Conquer the Number Plane

Prof. **Kyle Ormsby** [mathematics 2014–], who is set to start his tenure-track position at Reed this fall, is already bringing in the accolades. In May, Reed received a $172,146 research grant from the National Science Foundation for a project under Ormsby’s direction. The project “Structure and computations in motivic and chromatic homotopy” begins in September and continues through August 2017.

If the title leaves you scratching your head, Ormsby explains that the grant will provide support for his study of “some pieces of mathematics that lie at the intersection of topology and algebraic geometry.” Algebraic geometry, as you undoubtedly know, “narrows the focus of geometry, only studying shapes that are defined by polynomial equations.” Topology is the study of geometric properties that are unchanged by the continuous deformation of figures. For example, topologists consider doughnuts and coffee cups to belong to the same class (single-holed objects) because one could be stretched to resemble another.

“If topology’s objects are made out of saltwater taffy,” says Ormsby, “then algebraic geometry’s objects are constructed from peanut brittle—far more rigid and inflexible.”

Continue reading Reed Math Prof Wins NSF Grant

Almost any Reedie would tell you that they did not embark on the life of the mind for its monetary potential. Yet few would turn down the opportunity to earn some quick cash by flexing their mental muscle. On this week's episode of *Who Wants to be a Millionaire*, **Daniel Herman '15** did just that.

Daniel was well prepared for the show: having been on academic quiz teams in high school, and currently working towards a degree in math and physics he breezed through the first few questions. The question of which presidential couple had been married longest made him pause (answer: George and Barbara Bush), but he deployed a lifeline and continued on unabated. By the end of round one Daniel had $68,000 in the bank, and one lifeline left.

Continue reading Reedie Wants To Be a Millionaire

Fractals, the bizarre geometrical shapes that undergird natural phenomena from snowflakes to lightning bolts, have been discovered in a new and striking location: the synapses of the brain.

In a recent paper, professor **Richard Crandall '69** [physics 1978–] and colleagues at the Reed Center for Advanced Computation found intricate fractal patterns in synapses in the somatosensory neocortex of a mouse brain.

Continue reading Reed Prof Finds Fractal Geometry in Mouse Cortex

- “Zero Project” turns art gallery into airplane hangar
- Physics major builds a better brick
- Religion professor to discuss Islamophobia
- The Economics of the Big Cut
- Winter Fellows Circumnavigate the Globe
- Student Performers Win Kahan Fellowship
- Childcare Center Opens at Reed
- Great Pumpkin Appears in President’s Office
- Students nab prize for work on “hunger hormone”
- What is Reed’s “Return on Investment?”
- En Garde! Math-Econ Major Nabs Fencing Title
- Reed Dancers Score Major Achievement
- Researchers clear the air on power plant emissions
- Monkey Bar Quadrocycle Materializes on Quad
- Reed Wins Bike Challenge—Again
- Reed Runners Swarm Marathon
- Prof. Peter Rock Works Backwards to Cast "Spells"
- Night Owl, Psych Major Nab Thief in Broad Daylight
- Reed and the Rankings Racket
- Bike Co-op Named for Mark Angeles ’15

- Reed College Blogs
- Voices from Reed [admission]
- The Riffin' Griffin [alumni]
- Chemistry News [see if you can guess]
- Works&Days [Jobs, fellowships, and more]
- Politika [poli sci dept]
- Reed Linguistics
- SEEDS [Reed in the community]
- Reed Res Life [dorms]

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