Pieri Rules for Classical Groups and Equinumeration between Generalized Oscillating Tableaux and Semistandard Tableaux
				
										Keywords:
				
				
																		Standard tableuax, 													Oscillating tableaux, 													Semistandard tableaux, 													Pieri rules															
			
			
										Abstract
We present several equinumerous results between generalized oscillating tableaux and semistandard tableaux and give a representation-theoretic proof to them. As one of the key ingredients of the proof, we provide Pieri rules for the symplectic and orthogonal groups.