TY - BOOK AU - Penrose,Roger TI - Techniques of differential topology in relativity T2 - CBMS-NSF regional conference series in applied mathematics SN - 0898710057 AV - QC 173.59.M3 P34.1987 PY - 1987/// CY - Philadelphia, Pa. PB - Society for Industrial and Applied Mathematics KW - Relatividad (Física) KW - Topología diferencial N1 - Bibliografía: p. 72 ER -