TY - JOUR AU - Hu, Sze-Tsen TI - Invariance proof of simplicial homology and cohomology groups without using subdivisions or axiomatic approach JO - Portugaliae mathematica PY - 1970 SP - 49 EP - 58 VL - 29 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PORMA_1970__29_1_115108/ LA - en ID - PORMA_1970__29_1_115108 ER -