## Archive for the ‘Algebra’ Category

### Whitney Sum Formula and Exponentiation

Posted by: **yanzhang** on March 16, 2012

### Dickson invariants

Posted by: **Steven Sam** on March 17, 2011

### Why Hopf Algebras

Posted by: **yanzhang** on March 15, 2011

### On finding the ring of invariants

Posted by: **yanzhang** on May 27, 2010

### A Taxidermic Snake Lemma

Posted by: **Alexander Ellis** on April 19, 2010

### Three Ways to Skin a Combinatorics Problem

Posted by: **yanzhang** on February 16, 2010

### Groups of size less than 60

Posted by: **Steven Sam** on December 21, 2009

### A Free Association On Basic Adjoints

Posted by: **yanzhang** on October 2, 2009

### Chern classes and Riemann–Roch formalism

Posted by: **Steven Sam** on August 3, 2009

### Lambda-rings

Posted by: **Steven Sam** on July 23, 2009