Notice

New

Square root of R^3

  • Print
User Rating:  / 2
Details
Written by Admin
Hits: 1083


Asking cute questions is great.

 

Answering such questions is a nice challenge.

 

An article by Mark Dominus about this topics is here ( EN ).

 

Submit Square root of R^3 in Delicious Submit Square root of R^3 in Digg Submit Square root of R^3 in FaceBook Submit Square root of R^3 in Google Bookmarks Submit Square root of R^3 in Stumbleupon Submit Square root of R^3 in Technorati Submit Square root of R^3 in Twitter Submit Square root of R^3 in Twitter

Read more: Square root of R^3

0 Comments

Cardinality theorem *****

  • Print
User Rating:  / 2
Details
Written by Admin
Hits: 636

 

Two lines proof of the Cantor-Schroeder-Bernstein theorem ( EN ).

 

 

Submit Cardinality theorem ***** in Delicious Submit Cardinality theorem ***** in Digg Submit Cardinality theorem ***** in FaceBook Submit Cardinality theorem ***** in Google Bookmarks Submit Cardinality theorem ***** in Stumbleupon Submit Cardinality theorem ***** in Technorati Submit Cardinality theorem ***** in Twitter Submit Cardinality theorem ***** in Twitter

Read more: Cardinality theorem *****

0 Comments

Swindle? *****

  • Print
User Rating:  / 1
Details
Written by Admin
Hits: 606

YES, you can swindle Wink and prove theorems similar to this:

 

Swindle can be correctly used in many proofs, e.g.

Irreducibility of the sphere

Cantor–Bernstein–Schröder theorem ( Wiki EN )

...

Can you add the next one to the list?

Submit Swindle? ***** in Delicious Submit Swindle? ***** in Digg Submit Swindle? ***** in FaceBook Submit Swindle? ***** in Google Bookmarks Submit Swindle? ***** in Stumbleupon Submit Swindle? ***** in Technorati Submit Swindle? ***** in Twitter Submit Swindle? ***** in Twitter

Read more: Swindle? *****

0 Comments

On rare integers between 0 and 1 *****

  • Print
User Rating:  / 1
Details
Written by Admin
Hits: 577

 

 

 

Sexy & clean proof that π is irrational on Dror Bar-Natan pages in 5 full stopped sentences written on a CD envelope ( EN ). The shortest & simplest one?

 

 

 

 

 

 

Submit On rare integers between 0 and 1 ***** in Delicious Submit On rare integers between 0 and 1 ***** in Digg Submit On rare integers between 0 and 1 ***** in FaceBook Submit On rare integers between 0 and 1 ***** in Google Bookmarks Submit On rare integers between 0 and 1 ***** in Stumbleupon Submit On rare integers between 0 and 1 ***** in Technorati Submit On rare integers between 0 and 1 ***** in Twitter Submit On rare integers between 0 and 1 ***** in Twitter

0 Comments

A Streamlined Proof of an Essential Calculus Fact *****

  • Print
User Rating:  / 5
Details
Written by Admin
Hits: 882

GREAT NEW PROOF of the Fundamental Theorem of Calculus

Stephen M. Walk: A Streamlined Proof of an Essential Calculus Fact, The American Mathematical Monthly, Vol. 117, No. 9 (November 2010), pp. 832-833.

(JSTOR abstract EN, idea online EN, CZ)

 


 

Submit A Streamlined Proof of an Essential Calculus Fact ***** in Delicious Submit A Streamlined Proof of an Essential Calculus Fact ***** in Digg Submit A Streamlined Proof of an Essential Calculus Fact ***** in FaceBook Submit A Streamlined Proof of an Essential Calculus Fact ***** in Google Bookmarks Submit A Streamlined Proof of an Essential Calculus Fact ***** in Stumbleupon Submit A Streamlined Proof of an Essential Calculus Fact ***** in Technorati Submit A Streamlined Proof of an Essential Calculus Fact ***** in Twitter Submit A Streamlined Proof of an Essential Calculus Fact ***** in Twitter

Read more: A Streamlined Proof of an...

0 Comments

Formalized definitions and proofs **

  • Print
User Rating:  / 0
Details
Written by Admin
Hits: 288

Mizar system for such style writing math ( wiki EN, home EN ).

On formal discontinued project QED ( wiki EN ).

Submit Formalized definitions and proofs ** in Delicious Submit Formalized definitions and proofs ** in Digg Submit Formalized definitions and proofs ** in FaceBook Submit Formalized definitions and proofs ** in Google Bookmarks Submit Formalized definitions and proofs ** in Stumbleupon Submit Formalized definitions and proofs ** in Technorati Submit Formalized definitions and proofs ** in Twitter Submit Formalized definitions and proofs ** in Twitter

0 Comments

Archive of Formal Proofs **

  • Print
User Rating:  / 0
Details
Written by Admin
Hits: 335

An alive collection of formal proof materials ( EN ), organized in a way of a scientific journal.

Submit Archive of Formal Proofs ** in Delicious Submit Archive of Formal Proofs ** in Digg Submit Archive of Formal Proofs ** in FaceBook Submit Archive of Formal Proofs ** in Google Bookmarks Submit Archive of Formal Proofs ** in Stumbleupon Submit Archive of Formal Proofs ** in Technorati Submit Archive of Formal Proofs ** in Twitter Submit Archive of Formal Proofs ** in Twitter

0 Comments

Behold Proof of the Pythagorean Theorem *****

  • Print
User Rating:  / 0
Details
Written by Admin
Hits: 389

Bhaskara's (1114 - ca. 1185) Dissection Proof of the Pythagorean Theorem ( animation EN ).

Submit Behold Proof of the Pythagorean Theorem ***** in Delicious Submit Behold Proof of the Pythagorean Theorem ***** in Digg Submit Behold Proof of the Pythagorean Theorem ***** in FaceBook Submit Behold Proof of the Pythagorean Theorem ***** in Google Bookmarks Submit Behold Proof of the Pythagorean Theorem ***** in Stumbleupon Submit Behold Proof of the Pythagorean Theorem ***** in Technorati Submit Behold Proof of the Pythagorean Theorem ***** in Twitter Submit Behold Proof of the Pythagorean Theorem ***** in Twitter

0 Comments

Infinitude of primes using basic topology *****

  • Print
User Rating:  / 0
Details
Written by Admin
Hits: 353

Fürstenberg's proof of the infinitude of primes using basic topology ( wiki EN ).

Submit Infinitude of primes using basic topology ***** in Delicious Submit Infinitude of primes using basic topology ***** in Digg Submit Infinitude of primes using basic topology ***** in FaceBook Submit Infinitude of primes using basic topology ***** in Google Bookmarks Submit Infinitude of primes using basic topology ***** in Stumbleupon Submit Infinitude of primes using basic topology ***** in Technorati Submit Infinitude of primes using basic topology ***** in Twitter Submit Infinitude of primes using basic topology ***** in Twitter

0 Comments

Proofs in Wiki ***

  • Print
User Rating:  / 0
Details
Written by Admin
Hits: 324

 

A categorized list of proofs online ( wiki EN ).

Submit Proofs in Wiki *** in Delicious Submit Proofs in Wiki *** in Digg Submit Proofs in Wiki *** in FaceBook Submit Proofs in Wiki *** in Google Bookmarks Submit Proofs in Wiki *** in Stumbleupon Submit Proofs in Wiki *** in Technorati Submit Proofs in Wiki *** in Twitter Submit Proofs in Wiki *** in Twitter

0 Comments