Expansions of k-Schur Functions in the Affine nilCoxeter Algebra
				
										Keywords:
				
				
																		Schubert calculus, 													affine Grassmannian, 													nilCoxeter algebra, 													k-Schur															
			
			
										Abstract
We give a type free formula for the expansion of $k$-Schur functions indexed by fundamental coweights within the affine nilCoxeter algebra. Explicit combinatorics are developed in affine type $C$.