# Poincare Conjecture: Understanding & Appreciating the Proof

• Mosis
In summary, A person is seeking advice on how to understand and appreciate the proof of the Poincare Conjecture. They are starting a master's in pure math and their supervisor specializes in geometric analysis. They are looking for suggestions on how to approach this task and someone recommends a book called "The Poincare Conjecture" by Donal O'Shea as a good starting point due to its comprehensive coverage and bibliography.
Mosis
hello!

i would like to be able to understand and appreciate the proof of the poincare conjecture. i have some idea of where to begin, and my supervisor is going to help me out (i'm starting a master's in pure math and my supervisor does geometric analysis), but i was wondering if anyone here had any suggestsions on going about this monolithic task?

I don't wish to insult your intelligence but you could do worse than start with this populist book

The Poincare Conjecture
by
Donal O'Shea

It really is a jolly good read. Since it traces the history of the conjecture and the maths around it and has a reasonable bibliography it contains a compilation which forms an excellent starting point.

## 1. What is the Poincare Conjecture?

The Poincare Conjecture is a mathematical theorem that states that any closed 3-dimensional manifold is topologically equivalent to a 3-dimensional sphere. In simpler terms, it means that any shape that has no holes can be stretched and deformed into a perfect sphere.

## 2. Who first proposed the Poincare Conjecture?

The Poincare Conjecture was first proposed by the French mathematician Henri Poincare in 1904. He believed that this conjecture was a key to understanding the fundamental structure of the universe.

## 3. Why is the Poincare Conjecture important?

The Poincare Conjecture is important because it is a fundamental problem in mathematics and topology. Its proof has implications in various fields of science, including physics, biology, and computer science.

## 4. How was the Poincare Conjecture finally proven?

The Poincare Conjecture was finally proven in 2002 by the Russian mathematician Grigori Perelman. He developed a new mathematical approach called Ricci flow to tackle the problem. His work was later verified and recognized by the mathematical community, and he was awarded the Fields Medal in 2006.

## 5. What are the applications of the Poincare Conjecture?

The Poincare Conjecture has many applications in different fields. In physics, it has been used to study the topology of the universe and the behavior of space-time. In biology, it has been applied to the study of DNA and protein folding. In computer science, it has been used in data compression and pattern recognition algorithms.

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