Thirteenth Linkfest
The Thirteenth Linkfest is here! I have been quite busy lately, so I’m glad other bloggers have been keeping up the slack where I’ve been leaving it off. A lot of the posts in this linkfest are more topical than usual: whether you think it’s a blessing or a curse, we definitely live in interesting times. On the technical side, an alleged outline of a proof of the inconsistency of arithmetic was announced, and soon retracted as the community found problems. Besides that, several prominent mathematicians have announced major developments in their programs. On the non-technical side, the U.S. is rocked by Occupy protests, which dominate a lot of the blogosphere conversation. Hope you enjoy this linkfest!
The previous linkfest was: Linkfest 12
Technical
Harvey Friedman: Invariant Maximal Cliques and Incompleteness (PDF)
Richard Lipton: An Annoying Open Problem (Group Isomorphism)
John Armstrong: (Pseudo)-Riemannian Metrics, Isometries, Inner Products on 1-Forms, The Hodge Star in Coordinates, The Hodge Star on Differential Forms, Inner Products on Differential Forms
Santo D’Agostino: Dandelin Spheres
Terence Tao: The Jordan-Schur Theorem
John Baez: The Inconsistency of Arithmetic, Chaitin’s Theorem and the Surprise Examination Paradox
Noah Snyder: Subfactors of index less than 5
James Colliander: Edinburgh Arnold Memorial Workshop Notes
David Speyer: Random Partitions
Willie Wong: Gauge invariance, geometrically
Jesse Johnson: The generalized Scharlemann-Tomova conjecture
William Gasarch: Candidate for a new Millenium Problem
Scott Aaronson: In Defense of Kolmogorov Complexity
Emmanuel Kowalski: Families of cusp forms, Action Graphs
Akhil Mathew: Theorem A via general formalism
Lance Fortnow: Mahaney’s Theorem
Non-Technical
Steven Padnick: Batman the Plutocrat
George Csicsery: Julia Robinson and Hilbert’s Tenth Problem
Sunanda Creagh: Princeton bans academics from giving copyright to journal publishers
Michael Taylor: Peers, review your actions
Peter Gross: Beauty and the Beast’s Dark Delusion
Daniel Batchelder: Ersatz Genuineness in Little Mermaid’s “Under the Sea”
Richard Lipton: The Role of Memory in (Computer Science) Theory
William Gasarch: Where do theorems go to die?
Santo D’Agostino: Using failure as a friendly tool for learning
Nina Paley: Dear Internet, we need better image archives
Dave Winer: Google needs a Google, Can Larry Reboot Google?, Occupying Facebook, The message of Occupy
Vaslittlecrow: An open letter and warning from a former tea party movement adherent to the Occupy Wall Street movement (via zhai2nan2)
Jon Purdy: Correctness is a boolean
David Graeber: Occupy Wall Street rediscovers the radical imagination
Thirtyseven: #Occupy Itself
JSE: Is Arrow’s Theorem Interesting?
Lance Fortnow: Moneyball, Bibliographies, What is Random?
Tanya Khovanova: Star Trek TNG Science Quiz, David Bernstein’s Paradox
Andrew Gelman: Now you too can buy a selection of garbled Wikipedia articles for a mere $1400-$2800 a year!, That advice not to work so hard
Paul Raven: Robot Lawyers, Human Cashiers
Kareem Carr: The Work-Life Balance
Sam Shah: Putting ME first, (On teaching about) Absolute Values
Remy Porter: The New Hire’s A Bust
South Bend Seven: Bring on the driverless car!
Khatzumoto: In defense of kanji tattoo typos
Burt Totaro: What the papers say (about EPSRC)
Mike Fenwick: The Recipe Multiplier
Henry: Stories from the past: The Nintendo Website at Summer Camp
Bill Grazier: Laughing Our Way to the Altar
Ruben Berenguel: Being Zen in the middle of an argument
Giovanni Dannato: Genetic and Memetic Legacies
Paul Hartzog: Unemployment is the Cure
Darcy Tacoma: A Crash Course in Wine-Making
Art, Photography, Music, Etc.
Telefunker: Egg Factory D (abandoned Belgian egg factory pics)
Bradley Garrett: Space & Grime: Sapping Chicago’s Skyscrapers
Dusty Goodwin: Orders from Mordor (LoTR Remix)
D!tto: Lov.E (Wall-E Remix)