TY - BOOK AU - Shishkin,Grigory I. AU - Sishkina,Lidia P. TI - Difference methods for singular perturbation problems T2 - Chapman & Hall/CRC monographs and surveys in pure and applied mathematics SN - 9781584884590 AV - QC20.7.P47 .S54 2009 PY - 2009/// CY - Boca Raton, FL PB - CRC KW - Singular perturbations (Mathematics) KW - Difference equations KW - Numerical solutions KW - Algebra, Abstract ER -