Closing in on the twin prime conjecture
) - "Just months after Zhang
announced his result, Maynard
has presented an independent proof that pushes the gap down to 600. A new Polymath project
is in the planning stages, to try to combine the collaboration's techniques with Maynard's approach to push this bound even lower." [more inside]
This afternoon, Yitang Zhang of the University of New Hampshire gave a special seminar at Harvard, in which he announced that he had proved that there are infinitely many pairs of prime numbers separated by no more than 70,000,000
, a result differing only by a constant factor from the venerable twin prime conjecture
. Dan Goldston, who together with Yildirim and Pintz made the last major advance on prime gaps, said, ""I was doubtful I would ever live to see this result." Not enough excitement for one day? Harald Helfgott has just posted to the arXiv a proof of the ternary Goldbach conjecture:
every odd number is the sum of three primes.
In August of last year, mathematician Shinichi Mochizuki reported that he had solved one of the great puzzles of number theory: the ABC conjecture (previously on Metafilter
). Almost a year later, no one else knows whether he has succeeded. No one can understand his proof.
What is the smallest prime?
"It seems that the number two should be the obvious answer, and today it is, but it was not always so. There were times when and mathematicians for whom the numbers one and three were acceptable answers. To find the first prime, we must also know what the first positive integer is. Surprisingly, with the definitions used at various times throughout history, one was often not the first positive integer (some started with two, and a few with three). In this article, we survey the history of the primality of one, from the ancient Greeks to modern times. We will discuss some of the reasons definitions changed, and provide several examples. We will also discuss the last significant mathematicians to list the number one as prime."
New math theories reveal the nature of numbers
] - "We prove that partition numbers
are 'fractal' for every prime. These numbers
, in a way we make precise, are self-similar
in a shocking way. Our 'zooming' procedure resolves several open conjectures, and it will change how mathematicians study partitions." (/.
) [more inside]
Measure-theoretic probability: Why it should be learnt and how to get started.
The clickable chart of distribution relationships.
Just two of the interesting and informative probability resources I've learned about, along with countless other tidbits of information, from statistician John D. Cook
and his probability fact-of-the-day Twitter feed ProbFact
. John also has daily tip and fact Twitter feeds for Windows keyboard shortcuts
, regular expressions
, TeX and LaTeX
, algebra and number theory
, topology and geometry
, real and complex analysis
, and beginning tomorrow, computer science
The Zero Saga
contains a great deal of information about the concept of zero, and its relation to other numbers and concepts in mathematics. It was linked in Good Math, Bad Math
; which contains a variety of other informative articles on the numbers
that capture our imaginations
. (Note: You may want to skip past part 4 of the Zero Saga, as it contains replies to the site, and as such should probably be at the bottom of the page. But, to compensate, the comments on Good Math are better than most blogs I've read.)
"...the answer to Life, the Universe, and Everything is..." "Yes? Yes!?" "...42."via Dyson, Montgomery, Princeton, a cup of tea - as presented by Seed Magazine.
Who can name the bigger number?
I guarantee you will lose to the Busy Beavers. (No, infinity is not allowed, the bigger infinity is a different game.
) The author also debunks
in very simple terms the recent story that quantum computers perform calculations without being turned on
. My first post and disclaimer: I know the author from our mutual field of quantum information