# Roll Over, Pythagoras: the "Holy Grail" of Math May Have Been Found

Ever since antiquity we have been searching for perfect mathematical equations to explain a perfect Universe. Now a Japanese mathematician may have cracked an unsolved problem "at the center of everything."

**What's the Big Idea?**

The so-called "holy grail" of mathematics may have just been found. Shinichi Mochizuki, a professor at the Research Institute for Mathematical Sciences at Kyoto University, released a 500-page proof of the *abc conjecture* in number theory which involves the relationship between prime numbers, which I will attempt to describe as succinctly as possible below.

A lot of open theory on prime numbers is based on the abc conjecture. So if verified, Mochizuki's proof would mean a great leap forward in our understanding of primes. It could also be used to help simplify other complex proofs, such as Fermat's last theorem.

This is high-level mathematics, which is even inaccessible to many mathematicians. So it is with that caveat that we are providing the following links to you (extremely) intrepid math geeks out there. Here is Mochizuki's study in four parts:

*Mochizuki is a math genius who received his Ph.D from Princeton University at the age of 22 and hasn't slowed down since.*

**So what exactly is the abc conjecture?**

The clearest explanation I could find of the abc conjecture is this single paragraph from the ABC@home project from the Mathematical Institute of Leiden University:

The ABC conjecture involves abc-triples: positive integers a,b,c such that a+b=c, a < b < c, a,b,c have no common divisors and c > rad(abc), the so-called radical of abc.* The ABC conjecture says that there are only finitely many a,b,c such that log(c)/log(rad(abc)) > h for any real h > 1. The ABC conjecture is currently one of the greatest open problems in mathematics. If it is proven to be true, a lot of other open problems can be answered directly from it.

*The rad(abc) is the "product of the unique prime factors of a,b, and c"

**What's the Significance?**

Not surprisingly, there are many other descriptions of the abc conjecture that are completely unwieldy. So to put it as succinctly as possible, here's what Mochizuki had to solve: the conjecture states there is a finite group of triples with the properties described above. Since numbers go up toward infinity, one could find examples of these triples here and there until the end of time. Instead, what Mochizuki was able to establish was a logical reason for this pattern. In other words, he was able to identify exactly why these groups of numbers have always been considered special. If Mochizuki's work is verified, we will be able to finally prove a great deal of theorems largely built upon the abc conjecture in the field of number theory in ways that go even further over my head.

That is why Philip Ball in the journal *Nature *calls this an "astounding achievement" in the field of Mathematics, perhaps the most significant achievement so far in the 21st century.

Also worth reading is Ivars Peterson's MathTrek blog, from 1997, in which Peterson surveyed other mathematicians on the then-unsolved conjecture's significance. Here's Andrew J. Granville of the University of Georgia in Athens: "This strange conjecture turns out to be equivalent to all the main problems. It's at the center of everything that's been going on."

Peterson also quotes Dorian Goldfeld, who describes the conjecture as a true game-changer in a *Math Horizons* article:

It is more than utilitarian; to mathematicians it is also a thing of beauty. Seeing so many Diophantine problems unexpectedly encapsulated into a single equation drives home the feeling that all the subdisciplines of mathematics are aspects of a single underlying unity, and that at its heart lie pure language and simple expressibility.

*Image courtesy of Shutterstock*

*Follow Daniel Honan on Twitter @Daniel Honan*

# There are two kinds of failure – but only one is honorable

Malcolm Gladwell teaches "Get over yourself and get to work" for Big Think Edge.

- Learn to recognize failure and know the big difference between panicking and choking
**.** - At Big Think Edge, Malcolm Gladwell teaches how to check your inner critic and get clear on what failure is
**.** **Subscribe to Big Think Edge before we launch on March 30 to get 20% off monthly and annual memberships.**

# Why the ocean you know and love won’t exist in 50 years

Can sensitive coral reefs survive another human generation?

- Coral reefs may not be able to survive another human decade because of the environmental stress we have placed on them, says author David Wallace-Wells. He posits that without meaningful changes to policies, the trend of them dying out, even in light of recent advances, will continue.
- The World Wildlife Fund says that 60 percent of all vertebrate mammals have died since just 1970. On top of this, recent studies suggest that insect populations may have fallen by as much as 75 percent over the last few decades.
- If it were not for our oceans, the planet would probably be already several degrees warmer than it is today due to the emissions we've expelled into the atmosphere.

# Vikings unwittingly made their swords stronger by trying to imbue them with spirits

They didn't know it, but the rituals of Iron Age Scandinavians turned their iron into steel.

*Shutterstock*

- Iron Age Scandinavians only had access to poor quality iron, which put them at a tactical disadvantage against their neighbors.
- To strengthen their swords, smiths used the bones of their dead ancestors and animals, hoping to transfer the spirit into their blades.
- They couldn't have known that in so doing, they actually were forging a rudimentary form of steel.

# Health care: Information tech must catch up to medical marvels

Michael Dowling, Northwell Health's CEO, believes we're entering the age of smart medicine.

- The United States health care system has much room for improvement, and big tech may be laying the foundation for those improvements.
- Technological progress in medicine is coming from two fronts: medical technology and information technology.
- As information technology develops, patients will become active participants in their health care, and value-based care may become a reality.

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